阅读说明：本技术 用于测试卫星通信系统性能的系统及方法、装置、设备 (System, method, device and equipment for testing performance of satellite communication system ) 是由 李侠宇 马玉娟 柳明 刘硕 于 2021-08-03 设计创作，主要内容包括：本申请涉及卫星通信技术领域,公开一种用于测试卫星通信系统性能的系统,通过射频线缆分别在用户终端与卫星通信载荷之间、信关站与卫星通信载荷之间建立连接,并通过用户链路信道模拟器和馈电链路信道模拟器分别模拟用户链路和馈电链路的传输信道,以建立卫星通信系统,进而通过终端模拟器生成发送给信关站的第一反向链路信号或通过信关站模拟器生成发送给用户终端的第一前向链路信号,以测试卫星通信系统性能。相较于现有技术,不需要通过发射在轨试验卫星建立卫星通信系统,降低了对卫星通信系统的测试成本。本申请还公开一种用于测试卫星通信系统性能的方法、装置、设备。(The utility model relates to a satellite communication technical field discloses a system for testing satellite communication system performance, establish the connection between user terminal and satellite communication load, gateway station and satellite communication load respectively through the radio frequency cable, and simulate the transmission channel of user link and feeder link respectively through user link channel simulator and feeder link channel simulator to establish satellite communication system, and then generate the first reverse link signal of sending to the gateway station through the terminal simulator or generate the first forward link signal of sending to the user terminal through the gateway station simulator, with test satellite communication system performance. Compared with the prior art, the satellite communication system does not need to be established by launching the in-orbit test satellite, and the test cost of the satellite communication system is reduced. The application also discloses a method, a device and equipment for testing the performance of the satellite communication system.)

1. A system for testing the performance of a satellite communications system, comprising:

the user terminal comprises a terminal simulator and a terminal radio frequency device; the terminal simulator is used for generating a first reverse link signal sent to the gateway station; the terminal radio frequency device is provided with a terminal antenna and is used for sending the first reverse link signal and receiving a signal sent to the user terminal through the terminal antenna;

a satellite communication payload comprising a satellite simulator and a satellite radio frequency device; the satellite simulator is used for carrying out signal processing on an input signal; the satellite radio frequency device is provided with a satellite antenna and is used for receiving signals sent to the satellite communication load through the satellite antenna and sending signals processed through the satellite simulator;

the gateway station comprises a gateway station simulator and a gateway station radio frequency device; the gateway station emulator is configured to generate a first forward link signal for transmission to the user terminal; said gateway station radio frequency means for transmitting said first forward link signal and receiving signals transmitted to said gateway station; the gateway station radio frequency device is provided with a radio frequency interface;

a user link comprising a user link channel simulator; the user link channel simulator is used for simulating a user link channel between the satellite communication load and the user terminal;

a feeder link comprising a feeder link channel simulator; the feeder link channel simulator is used for simulating a feeder link channel between the gateway station and the satellite communication load;

a first radio frequency cable configured to connect the terminating radio frequency device with the user link channel simulator;

a second radio frequency cable configured to connect the user link channel simulator with the satellite radio frequency device;

a third radio frequency cable configured to connect the satellite radio frequency device with the feeder link channel simulator;

a fourth radio frequency cable configured to connect the feeder link channel simulator with a radio frequency interface of the gateway station radio frequency device.

2. The system according to claim 1, wherein in case that the terminal antenna of the terminal rf device is a detachable antenna, the terminal rf device is further provided with an rf port, and the rf port of the terminal rf device is connected to the user link channel simulator through the first rf cable.

3. The system for testing the performance of a satellite communication system according to claim 1, wherein in case the terminal antenna of the terminal radio frequency device is a non-detachable antenna, further comprising:

the user terminal is arranged in the terminal darkroom;

the terminal radio frequency device is also provided with a first receiving and transmitting antenna; the first receiving and transmitting antenna is used for carrying out signal transmission with the terminal antenna;

the first transceiving antenna is connected with the user link channel simulator through the first radio frequency cable.

4. The system for testing the performance of a satellite communication system according to any one of claims 1 to 3, wherein in the case that the satellite antenna of the satellite radio frequency device is a detachable antenna, the satellite radio frequency device is further provided with a radio frequency port, and the radio frequency port of the satellite radio frequency device is connected with the user link channel simulator through the second radio frequency cable; and the radio frequency port of the satellite radio frequency device is connected with the feeder link channel simulator through the third radio frequency cable.

5. The system for testing the performance of a satellite communication system according to any one of claims 1 to 3, wherein in case the satellite antenna of the satellite radio frequency device is a non-detachable antenna, further comprising:

the satellite darkroom is provided with the satellite communication load;

the satellite radio frequency device also comprises a second transceiving antenna and a third transceiving antenna; the second transceiving antenna and the third transceiving antenna are used for communicating with a satellite antenna;

the second receiving and transmitting antenna is connected with the user link channel simulator through the second radio frequency cable; the third transceiving antenna is connected with the feeder link channel simulator through the third radio frequency cable.

6. A method for testing the performance of a satellite communication system, the method being implemented by a system for testing the performance of a satellite communication system according to any one of claims 1 to 5, the method comprising:

the user link channel simulator simulates a user link channel according to preset user link channel parameters; the feeder link channel simulator simulates a feeder link channel according to preset feeder link channel parameters;

the first radio frequency cable is used for signal transmission between the user link channel and the user terminal; the second radio frequency cable is used for signal transmission between the user link channel and the satellite communication payload; the third radio frequency cable is used for signal transmission between the feeder link channel and the satellite communication payload; the fourth radio frequency cable is used for signal transmission between the feeder link channel and the gateway station;

under the condition that the terminal simulator generates and sends a first reverse link signal to the gateway station, obtaining a comparison result corresponding to the first reverse link signal so as to test the performance of the satellite communication system; or, under the condition that the gateway station simulator generates and sends a first forward link signal to the user terminal, obtaining a comparison result corresponding to the first forward link signal so as to realize the test of the performance of the satellite communication system.

7. The method of claim 6, wherein said terminal simulator generates and transmits a first reverse link signal to said gateway station, comprising:

the terminal simulator generates a first reverse link signal according to a preset terminal service parameter;

the terminal simulator sends the first reverse link signal to the user link channel simulator through the terminal radio frequency device;

the user link channel simulator receives the first reverse link signal, inputs the first reverse link signal into the user link channel, and obtains a second reverse link signal;

the user link channel simulator sends the second reverse link signal to the satellite simulator;

the satellite simulator receives a second reverse link signal sent by the user link channel simulator through the satellite radio frequency device, and performs signal processing on the second reverse link signal to obtain a third reverse link signal;

the satellite simulator transmits the third reverse link signal to the feeder link channel simulator through the satellite radio frequency device;

the feed link channel simulator receives a third reverse link signal sent by the satellite simulator, and inputs the third reverse link signal into the feed link channel to obtain a fourth reverse link signal;

said feeder-link channel simulator transmitting said fourth reverse-link signal to said gateway station radio frequency device;

the gateway station radio frequency device receives a fourth reverse link signal.

8. The method of claim 6, wherein the gateway station simulator generates and transmits a first forward link signal to the user terminal, comprising:

the gateway station simulator generates a first forward link signal according to preset gateway station service parameters;

the gateway station simulator transmits the first forward link signal to the feeder link channel simulator through the gateway station radio frequency device;

the feeder link channel simulator receives the first forward link signal, inputs the first forward link signal into the feeder link channel, and obtains a second forward link signal;

the feeder link channel simulator transmits the second forward link signal to the satellite simulator;

the satellite simulator receives a second forward link signal sent by the feeder link channel simulator through the satellite radio frequency device, and performs signal processing on the second forward link signal to obtain a third forward link signal;

the satellite simulator transmits the third forward link signal to the user link channel simulator through the satellite radio frequency device;

the user link channel simulator receives a third forward link signal sent by the satellite simulator, inputs the third forward link signal into the user link channel, and obtains a fourth forward link signal;

the user link channel simulator sends the fourth forward link signal to the terminal radio frequency device;

the terminal radio frequency device receives the fourth forward link signal.

9. An apparatus for testing performance of a satellite communications system, comprising a processor and a memory having stored thereon program instructions, wherein the processor is configured to perform the method for testing performance of a satellite communications system of any of claims 6 to 8 when executing the program instructions.

10. An apparatus comprising the means for testing the performance of a satellite communication system of claim 9.

Technical Field

The present application relates to the field of satellite communications technologies, and in particular, to a system, a method, an apparatus, and a device for testing performance of a satellite communications system.

Background

The satellite communication system is generally composed of a gateway station, a satellite communication load and a user terminal, and is an effective means for realizing ground and air and ground communication by using the satellite communication load as a communication carrier. The system can provide information network service for various users such as land, ocean, sky and the like, and has wide application scenes. Generally, a communication link between a user terminal and a satellite communication load is referred to as a user link, and a communication link between a gateway station and the satellite communication load is referred to as a feeder link, and since the user link and the feeder link have various channel characteristics such as signal fading, time delay, multipath, doppler effect, and various extreme weather conditions such as weather, rain, thunder, and lightning occur, the channel environment has a great influence on the communication performance of the satellite communication system. Therefore, the influence of the channel environment on the communication performance needs to be fully considered when designing the satellite communication system, and thus the performance of the satellite communication system needs to be tested.

The existing method for testing the performance of the satellite communication system needs to transmit an in-orbit test satellite, and the in-orbit test satellite is used for transmitting signals between the satellite and a terminal and between the satellite and a gateway station, so as to test the satellite communication system. Due to the high price of the launching test satellite, the testing cost of the satellite communication performance is high.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a system, a method, a device and equipment for testing the performance of a satellite communication system, so as to reduce the cost for testing the performance of the satellite communication system.

In some embodiments, a system for testing the performance of a satellite communication system comprises: the user terminal comprises a terminal simulator and a terminal radio frequency device; the terminal simulator is used for generating a first reverse link signal sent to the gateway station; the terminal radio frequency device is provided with a terminal antenna and is used for sending the first reverse link signal and receiving a signal sent to the user terminal through the terminal antenna; a satellite communication payload comprising a satellite simulator and a satellite radio frequency device; the satellite simulator is used for carrying out signal processing on an input signal; the satellite radio frequency device is provided with a satellite antenna and is used for receiving signals sent to the satellite communication load through the satellite antenna and sending signals processed through the satellite simulator; the gateway station comprises a gateway station simulator and a gateway station radio frequency device; the gateway station emulator is configured to generate a first forward link signal for transmission to the user terminal; said gateway station radio frequency means for transmitting said first forward link signal and receiving signals transmitted to said gateway station; the gateway station radio frequency device is provided with a radio frequency interface; a user link comprising a user link channel simulator; the user link channel simulator is used for simulating a user link channel between the satellite communication load and the user terminal; a feeder link comprising a feeder link channel simulator; the feeder link channel simulator is used for simulating a feeder link channel between the gateway station and the satellite communication load; a first radio frequency cable configured to connect the terminating radio frequency device with the user link channel simulator; a second radio frequency cable configured to connect the user link channel simulator with the satellite radio frequency device; a third radio frequency cable configured to connect the satellite radio frequency device with the feeder link channel simulator; a fourth radio frequency cable configured to connect the feeder link channel simulator with a radio frequency interface of the gateway station radio frequency device.

In some embodiments, a method for testing performance of a satellite communication system is implemented according to the system for testing performance of a satellite communication system described above, the method comprising: the user link channel simulator simulates a user link channel according to preset user link channel parameters; the feeder link channel simulator simulates a feeder link channel according to preset feeder link channel parameters; the first radio frequency cable is used for signal transmission between the user link channel and the user terminal; the second radio frequency cable is used for signal transmission between the user link channel and the satellite communication payload; the third radio frequency cable is used for signal transmission between the feeder link channel and the satellite communication payload; the fourth radio frequency cable is used for signal transmission between the feeder link channel and the gateway station; under the condition that the terminal simulator generates and sends a first reverse link signal to the gateway station, obtaining a comparison result corresponding to the first reverse link signal so as to test the performance of the satellite communication system; or, under the condition that the gateway station simulator generates and sends a first forward link signal to the user terminal, obtaining a comparison result corresponding to the first forward link signal so as to realize the test of the performance of the satellite communication system.

In some embodiments, an apparatus for testing performance of a satellite communication system includes a processor and a memory storing program instructions, the processor configured to, when executing the program instructions, perform the above-described method for testing performance of a satellite communication system.

In some embodiments, an apparatus comprises the above-described means for testing the performance of a satellite communication system.

The system, the method, the device and the equipment for testing the performance of the satellite communication system can realize the following technical effects: the method comprises the steps of establishing connection between a user terminal and a satellite communication load and between a gateway station and the satellite communication load through radio frequency cables, respectively simulating transmission channels of a user link and a feeder link through a user link channel simulator and a feeder link channel simulator to establish a satellite communication system, and further generating a first reverse link signal sent to the gateway station through the terminal simulator or generating a first forward link signal sent to the user terminal through the gateway station simulator to test the performance of the satellite communication system. Compared with the prior art, the satellite communication system does not need to be established by launching the in-orbit test satellite, and the test cost of the satellite communication system is reduced.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic diagram of a system for testing the performance of a satellite communications system provided by an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of another system for testing the performance of a satellite communications system provided by an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a method for testing the performance of a satellite communication system according to an embodiment of the present disclosure;

fig. 4 is a timing diagram illustrating a method for a terminal simulator to generate and transmit a first reverse link signal to a gateway station in accordance with an embodiment of the present disclosure;

fig. 5 is a timing diagram illustrating a method for generating and transmitting a first forward link signal to a user terminal by a gateway station simulator according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of an apparatus for testing performance of a satellite communication system according to an embodiment of the disclosure.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.

As shown in fig. 1, the embodiment of the present disclosure provides a system for testing the performance of a satellite communication system, which includes a user terminal 101, a satellite communication payload 102, a gateway station 103, a user link 104, a feeder link 105, a first radio frequency cable 106, a second radio frequency cable 107, a third radio frequency cable 108, and a fourth radio frequency cable 109. The user terminal 101 comprises a terminal simulator and a terminal radio frequency device; the terminal simulator is used for generating a first reverse link signal sent to the gateway station; the terminal radio frequency device is provided with a terminal antenna and is used for sending a first reverse link signal and receiving a signal sent to the user terminal through the terminal antenna. The satellite communication payload 102 includes a satellite simulator and a satellite radio frequency device; the satellite simulator is used for carrying out signal processing on the input signal; the satellite radio frequency device is provided with a satellite antenna and is used for receiving signals sent to a satellite communication load through the satellite antenna and sending signals processed through a satellite simulator. The gateway station 103 comprises a gateway station simulator and a gateway station radio frequency device; the gateway station simulator is used for generating a first forward link signal sent to the user terminal; the gateway station radio frequency device is used for transmitting a first forward link signal and receiving a signal transmitted to the gateway station; the gateway station radio frequency device is provided with a radio frequency interface. The user link 104 includes a user link channel simulator; the user link channel simulator is used for simulating a user link channel between the satellite communication payload and the user terminal. Feeder link 105 includes a feeder link channel simulator; the feeder link channel simulator is used for simulating a feeder link channel between the gateway station and the satellite communication load. The first radio frequency cable 106 is configured to connect the terminating radio frequency device with the user link channel simulator. The second radio frequency cable 107 is configured to connect the user link channel simulator with the satellite radio frequency device. The third radio frequency cable 108 is configured to connect the satellite radio frequency device with the feeder link channel simulator. The fourth radio frequency cable 109 is configured to connect the feeder link channel simulator with the radio frequency interface of the gateway station radio frequency device.

By adopting the system for testing the performance of the satellite communication system provided by the embodiment of the disclosure, the connection is respectively established between the user terminal and the satellite communication load and between the gateway station and the satellite communication load through the radio frequency cable, the transmission channels of the user link and the feed link are respectively simulated through the user link channel simulator and the feed link channel simulator so as to establish the satellite communication system, and then the first reverse link signal sent to the gateway station is generated through the terminal simulator or the first forward link signal sent to the user terminal is generated through the gateway station simulator so as to test the performance of the satellite communication system. Compared with the prior art, the satellite communication system does not need to be established by launching the in-orbit test satellite, and the test cost of the satellite communication system is reduced.

Optionally, the gateway station radio frequency device is provided with a detachable parabolic aerial, which is connected to a radio frequency port of the gateway station radio frequency device. In some embodiments, the parabolic antenna connected to the radio frequency port of the gateway station radio frequency device is removed, and the radio frequency port is connected to the feeder link channel simulator via a fourth radio frequency cable, so that the gateway station is connected to the feeder link channel simulator, thereby establishing the satellite communication system.

Optionally, in a case that the terminal antenna of the terminal radio frequency device is a detachable antenna, the terminal radio frequency device is further provided with a radio frequency port, and the radio frequency port of the terminal radio frequency device is connected to the user link channel simulator through a first radio frequency cable.

In some embodiments, the terminal antenna of the terminal rf device is a detachable antenna, such as a parabolic antenna, an omnidirectional antenna, or the like, and the terminal antenna is connected to the rf port of the terminal rf device. And disassembling a terminal antenna connected with a radio frequency port of the terminal radio frequency device, and connecting the radio frequency port of the terminal radio frequency device with the user link channel simulator through a first radio frequency cable, so that the user terminal and the user link channel simulator perform signal transmission, and a satellite communication system is further established.

Optionally, in a case that the terminal antenna of the terminal radio frequency device is a non-detachable antenna, the method further includes: the terminal darkroom is arranged in the terminal darkroom; the terminal radio frequency device is also provided with a first receiving and transmitting antenna; the first receiving and transmitting antenna is used for carrying out signal transmission with the terminal antenna; the first transceiving antenna is connected with the user link channel simulator through a first radio frequency cable.

In some embodiments, the terminal antenna provided by the terminal radio frequency device is a non-detachable antenna, such as a phased array antenna. The satellite communication system is established by arranging the user terminal in a terminal darkroom, carrying out signal transmission with the terminal antenna through a first receiving and transmitting antenna of the terminal radio frequency device, and connecting the first receiving and transmitting antenna with the user link channel simulator through a first radio frequency cable.

Alternatively, in the case where the terminal antenna is a phased array antenna, the terminal antenna changes the propagation direction of a signal by controlling the feeding phase of a radiating element in the terminal antenna. Therefore, the signal propagation direction of the terminal antenna does not need to be changed by changing the physical direction of the terminal antenna, and the terminal antenna and the first transceiving antenna can conveniently transmit signals.

Optionally, the terminal darkroom is a space formed by a metal shield and a wave-absorbing material, and can isolate external electromagnetic waves without signal reflection in the space. Therefore, under the condition of testing the performance of the satellite communication system, the user terminal in the terminal darkroom can be prevented from being interfered by clutter of the external environment, the signal reflection in the terminal darkroom is reduced, and the testing precision is improved.

Optionally, the first transceiving antenna is a set of transceiving antennas or a plurality of sets of transceiving antennas.

Optionally, in a case that the first transceiving antenna is a group of transceiving antennas, the group of transceiving antennas is fixed at a preset position on an inner wall of the terminal darkroom.

Optionally, in a case that the first transceiving antenna is a plurality of sets of transceiving antennas, each set of transceiving antenna is fixed at a different position on an inner wall of the terminal darkroom. Therefore, the communication performance between the terminal antenna and the terminal antenna is tested through the transmitting and receiving antennas at different positions, the testing range is expanded, and the testing accuracy is improved.

Optionally, when the first transceiving antenna is a group of transceiving antennas, the inner wall of the terminal darkroom is provided with a first two-dimensional guide rail, the first two-dimensional guide rail is provided with a movable device, the movable device moves on the transverse guide rail and the longitudinal guide rail of the first two-dimensional guide rail through the programmable motor, and the first transceiving antenna is fixed on the movable device. Therefore, the first transceiving antenna can move freely in the moving range of the first two-dimensional guide rail, so that the communication performance between the first transceiving antenna and the terminal antenna at different positions can be tested, the testing range is expanded, and the testing accuracy is improved.

Optionally, in a case that the satellite antenna of the satellite radio frequency device is a detachable antenna, the satellite radio frequency device is further provided with a radio frequency port, and the radio frequency port of the satellite radio frequency device is connected with the user link channel simulator through a second radio frequency cable; the radio frequency port of the satellite radio frequency device is connected with the feeder link channel simulator through a third radio frequency cable.

In some embodiments, the satellite antenna of the satellite rf device is a detachable antenna, such as a parabolic antenna, an omnidirectional antenna, or the like, and the satellite antenna is connected to the rf port of the satellite rf device. And disassembling the satellite antenna connected with the radio frequency port of the satellite radio frequency device, connecting the radio frequency port of the satellite radio frequency device with the user link channel simulator through a second radio frequency cable, and connecting the radio frequency port of the satellite radio frequency device with the feed link channel simulator through a third radio frequency cable, so that the satellite communication load respectively carries out signal transmission with the user link channel simulator and the feed link channel simulator, and a satellite communication system is further established.

Optionally, in a case that the satellite antenna of the satellite radio frequency device is a non-detachable antenna, the method further includes: the satellite darkroom is provided with a satellite communication load; the satellite radio frequency device also comprises a second transceiving antenna and a third transceiving antenna; the second transceiving antenna and the third transceiving antenna are used for communicating with the satellite antenna; the second receiving and transmitting antenna is connected with the user link channel simulator through a second radio frequency cable; the third transceiving antenna is connected with the feeder link channel simulator through a third radio frequency cable.

In some embodiments, the satellite antenna provided by the satellite radio frequency device is a non-removable antenna, such as a phased array antenna. The satellite communication load is arranged in a satellite darkroom, signal transmission is carried out on the satellite communication load and the satellite antenna through the second receiving and transmitting antenna and the third receiving and transmitting antenna respectively, the second receiving and transmitting antenna is connected with the user link channel simulator through the second radio frequency cable, and the third receiving and transmitting antenna is connected with the feed link channel simulator through the third radio frequency cable, so that a satellite communication system is established, and the problem that the satellite communication load cannot carry out signal transmission on the satellite communication load and the user link channel simulator and the feed link channel simulator respectively through the radio frequency port due to the fact that the satellite antenna of the satellite radio frequency device cannot be detached is solved.

Alternatively, in the case where the satellite antenna is a phased array antenna, the satellite antenna changes the propagation direction of a signal by controlling the feed phase of a radiation element in the satellite antenna. Therefore, the signal propagation direction of the satellite antenna does not need to be changed by changing the physical direction of the satellite antenna, and the satellite antenna can conveniently transmit signals with the second transceiving antenna and the third transceiving antenna respectively.

Optionally, the satellite darkroom is a space formed by a metal shield and a wave-absorbing material, and can isolate external electromagnetic waves without signal reflection in the space. Therefore, under the condition of testing the performance of the satellite communication system, the satellite communication load in the satellite darkroom can be prevented from being interfered by clutter of the external environment, the signal reflection in the satellite darkroom is reduced, and the testing precision is improved.

Optionally, the second transceiving antenna is a set of transceiving antennas or a plurality of sets of transceiving antennas.

Optionally, in a case that the second transceiving antenna is a set of transceiving antennas, the set of transceiving antennas is fixed at a preset position on an inner wall of the satellite darkroom.

Optionally, in a case that the second transceiving antenna is a plurality of sets of transceiving antennas, each set of transceiving antenna is fixed at a different position on an inner wall of the satellite darkroom. Therefore, the communication performance between the satellite antenna and the satellite antenna is tested through the transmitting and receiving antennas at different positions, the testing range is expanded, and the testing accuracy is improved.

Optionally, when the second transceiving antenna is a group of transceiving antennas, a second two-dimensional guide rail is arranged on the inner wall of the satellite darkroom, a moving device is arranged on the second two-dimensional guide rail, the moving device moves on the transverse guide rail and the longitudinal guide rail of the second two-dimensional guide rail through a programmable motor, and the second transceiving antenna is fixed on the moving device. Therefore, the second transceiving antenna can move freely in the moving range of the second two-dimensional guide rail so as to test the communication performance between the second transceiving antenna and the satellite antenna at different positions, the test range is expanded, and the test accuracy is improved.

Optionally, the third transceiving antenna is a set of transceiving antennas or a plurality of sets of transceiving antennas.

Optionally, in a case that the third transceiving antenna is a set of transceiving antennas, the set of transceiving antennas is fixed at a position of an inner wall of the preset satellite darkroom.

Optionally, in a case that the third transceiving antenna is a plurality of sets of transceiving antennas, each set of transceiving antenna is fixed at a different position on an inner wall of the satellite darkroom. Therefore, the communication performance between the satellite antenna and the satellite antenna is tested through the transmitting and receiving antennas at different positions, the testing range is expanded, and the testing accuracy is improved.

Optionally, when the third transceiving antenna is a group of transceiving antennas, a third two-dimensional guide rail is arranged on the inner wall of the satellite darkroom, a movable device is arranged on the third two-dimensional guide rail, the movable device moves on the transverse guide rail and the longitudinal guide rail of the third two-dimensional guide rail through a programmable motor, and the third transceiving antenna is fixed on the movable device. Therefore, the third transceiving antenna can move freely in the moving range of the third two-dimensional guide rail so as to test the communication performance between the third transceiving antenna and the satellite antenna at different positions, the test range is expanded, and the test accuracy is improved.

Referring to fig. 2, the embodiment of the present disclosure provides a system for testing the performance of a satellite communication system, which includes a user terminal 201, a satellite communication payload 202, a gateway station 203, a user link 204, a feeder link 205, a first rf cable 206, a second rf cable 207, a third rf cable 208, a fourth rf cable 209, a terminal darkroom 210 and a satellite darkroom 211. The user terminal 201 comprises a terminal simulator and a terminal radio frequency device; the terminal simulator is used for generating a reverse link signal; the terminal radio frequency device is provided with a terminal antenna and a first transceiving antenna; the terminal radio frequency device is used for transmitting a first reverse link signal and receiving a signal transmitted to the user terminal. The satellite communication payload 202 includes a satellite simulator and a satellite radio frequency device; the satellite simulator is used for carrying out signal processing on the input signal; the satellite radio frequency device is provided with a satellite antenna, a second transceiving antenna and a third transceiving antenna; the satellite radio frequency device is used for receiving signals sent to the satellite communication load and sending signals processed by the satellite simulator. The gateway station 203 comprises a gateway station simulator and a gateway station radio frequency device; the gateway station simulator is used for generating a forward link signal; the gateway station radio frequency device is used for transmitting a first forward link signal and receiving a signal transmitted to the gateway station; the gateway station radio frequency device is provided with a radio frequency interface. The user link 204 includes a user link channel simulator; the user link channel simulator is used for simulating a user link channel between the satellite communication payload and the user terminal. Feeder link 205 includes a feeder link channel simulator; the feeder link channel simulator is used for simulating a feeder link channel between the gateway station and the satellite communication load. The first radio frequency cable 206 is configured to connect the terminating radio frequency device with the user link channel simulator. The second radio frequency cable 207 is configured to connect the user link channel simulator with the satellite radio frequency device. The third radio frequency cable 208 is configured to connect the satellite radio frequency device with the feeder link channel simulator. The fourth radio frequency cable 209 is configured to connect the feeder link channel simulator with the radio frequency interface of the gateway station radio frequency device. And a terminal darkroom 210 in which the user terminal is arranged. And the satellite darkroom 211 is provided with a satellite communication load in the terminal darkroom.

By adopting the system for testing the performance of the satellite communication system provided by the embodiment of the disclosure, the connection is respectively established between the user terminal and the satellite communication load and between the gateway station and the satellite communication load through the radio frequency cable, the transmission channels of the user link and the feed link are respectively simulated through the user link channel simulator and the feed link channel simulator so as to establish the satellite communication system, and then the first reverse link signal sent to the gateway station is generated through the terminal simulator or the first forward link signal sent to the user terminal is generated through the gateway station simulator so as to test the performance of the satellite communication system. Compared with the prior art, the satellite communication system does not need to be established by launching the in-orbit test satellite, and the test cost of the satellite communication system is reduced. In addition, different satellite communication scenes such as voice, data, the Internet of things and the like can be established through the satellite communication system, different protocol flows such as registration, activation, paging, random access and the like are simulated in different scenes, system performance in the flows is verified, and the test application range of the satellite communication system is expanded.

As shown in fig. 3, an embodiment of the present disclosure provides a method for testing performance of a satellite communication system, where the method is implemented according to the system for testing performance of a satellite communication system, and the method includes:

step S301, a user link channel simulator simulates a user link channel according to preset user link channel parameters; the feeder link channel simulator simulates a feeder link channel according to preset feeder link channel parameters;

step S302, a first radio frequency cable is used for signal transmission between a user link channel and a user terminal; the second radio frequency cable is used for signal transmission between a user link channel and a satellite communication load; the third radio frequency cable is used for signal transmission between the feeder link channel and the satellite communication load; the fourth radio frequency cable is used for signal transmission between the feeder link channel and the gateway station;

step S303, under the condition that the terminal simulator generates and sends the first reverse link signal to the gateway station, obtaining a comparison result corresponding to the first reverse link signal so as to realize the test of the performance of the satellite communication system; or, under the condition that the gateway station simulator generates and sends the first forward link signal to the user terminal, the comparison result corresponding to the first forward link signal is obtained, so as to realize the test of the performance of the satellite communication system.

The method for testing the performance of the satellite communication system is realized according to the system for testing the performance of the satellite communication system, the transmission channels of a user link and a feeder link are respectively simulated through a user link channel simulator and a feeder link channel simulator, signal transmission is carried out through a radio frequency cable to establish the satellite communication system, and then a first reverse link signal sent to a gateway station is generated through a terminal simulator of a user terminal or a first forward link signal sent to the user terminal is generated through a gateway station simulator of the gateway station, so that a comparison result for testing the performance of the satellite communication system is obtained, and the performance of the satellite communication system is tested. Compared with the prior art, the satellite communication system does not need to be established by launching the in-orbit test satellite, and the test cost of the satellite communication system is reduced.

Optionally, the user link channel parameters include user link channel characteristics and user link environment parameters; the user link channel characteristics include one or more of propagation delay, delay variation rate, doppler frequency shift, doppler code bias, free space loss, atmospheric absorption, cloud and rain fading, multipath fading, and the like, and the user link environment parameters include one or more of track height, carrier frequency band, beam characteristics, weather, geographic environment, and the like.

Optionally, the user link channel comprises a first sub-channel and a second sub-channel; the first sub-channel is used for receiving a signal sent by a user terminal and outputting the signal to a satellite communication load; and the second sub-channel is used for receiving the signal sent by the satellite communication load and outputting the signal to the user terminal.

Optionally, the feeder link channel parameters comprise feeder link channel characteristics and feeder link environment parameters; the feeder link channel characteristics comprise one or more of propagation delay, delay variation rate, Doppler frequency shift, Doppler code offset, free space loss, atmospheric absorption, cloud rain fading, multipath fading and the like, and the feeder link environment parameters comprise one or more of track height, carrier frequency band, beam characteristics, weather, geographic environment and the like.

Optionally, the feeder-link channel comprises a third subchannel and a fourth subchannel; the third sub-channel is used for receiving signals sent by the gateway station and outputting the signals to the satellite communication load; and the fourth sub-channel is used for receiving signals transmitted by the satellite communication load and outputting the signals to the gateway station.

As shown in fig. 4, an embodiment of the present disclosure provides a method for a terminal simulator to generate and transmit a first reverse link signal to a gateway station, including:

step S401, a terminal simulator generates a first reverse link signal according to a preset terminal service parameter;

step S402, the terminal simulator sends a first reverse link signal to the user link channel simulator through the terminal radio frequency device;

step S403, the user link channel simulator receives the first reverse link signal, inputs the first reverse link signal into the user link channel, and obtains a second reverse link signal;

step S404, the user link channel simulator sends a second reverse link signal to the satellite simulator;

step S405, the satellite simulator receives a second reverse link signal sent by the user link channel simulator through the satellite radio frequency device, and performs signal processing on the second reverse link signal to obtain a third reverse link signal;

step S406, the satellite simulator sends a third reverse link signal to the feeder link channel simulator through the satellite radio frequency device;

step S407, the feeder link channel simulator receives a third reverse link signal sent by the satellite simulator, and inputs the third reverse link signal into the feeder link channel to obtain a fourth reverse link signal;

step S408, the feed link channel simulator sends a fourth reverse link signal to the gateway station radio frequency device;

in step S409, the gateway station rf device receives the fourth reverse link signal.

Optionally, the terminal traffic parameter includes one or more of a communication rate of the first reverse link signal, a random access success rate, a voice call quality, and the like.

Optionally, the signal processing includes one or more of denoising, frequency conversion, signal amplification, and the like.

Optionally, in a case where the terminal simulator generates and sends the first reverse link signal to the gateway station, obtaining a comparison result corresponding to the first reverse link signal includes: under the condition that the terminal simulator generates and sends a first reverse link signal to the gateway station, receiving the first reverse link signal generated by the terminal simulator and a fourth reverse link signal received by a radio frequency device of the gateway station through a server; and comparing the first reverse link signal generated by the terminal simulator with the fourth reverse link signal received by the gateway station radio frequency device through the server to obtain a comparison result corresponding to the first reverse link signal.

As shown in fig. 5, an embodiment of the present disclosure provides a method for a gateway station simulator to generate and transmit a first forward link signal to a user terminal, including:

step S501, a gateway station simulator generates a first forward link signal according to a preset gateway station service parameter;

step S502, the gateway station simulator sends a first forward link signal to the feeder link channel simulator through the gateway station radio frequency device;

step S503, the feeder link channel simulator receives the first forward link signal, and inputs the first forward link signal into the feeder link channel to obtain a second forward link signal;

step S504, the feed link channel simulator sends a second forward link signal to the satellite simulator;

step S505, the satellite simulator receives a second forward link signal sent by the feeder link channel simulator through the satellite radio frequency device, and performs signal processing on the second forward link signal to obtain a third forward link signal;

step S506, the satellite simulator sends a third forward link signal to the user link channel simulator through the satellite radio frequency device;

step S507, the user link channel simulator receives a third forward link signal sent by the satellite simulator, and inputs the third forward link signal into a user link channel to obtain a fourth forward link signal;

step S508, the user link channel simulator sends the fourth forward link signal to the terminal radio frequency device;

in step S509, the terminal rf device receives the fourth forward link signal.

Optionally, the gateway station traffic parameter includes one or more of a communication rate of the first forward link signal, a random access success rate, a voice call quality, and the like.

Optionally, the signal processing includes one or more of denoising, frequency conversion, signal amplification, and the like.

Optionally, in a case where the gateway station simulator generates and sends the first forward link signal to the user terminal, obtaining a comparison result corresponding to the first forward link signal includes: under the condition that the gateway station simulator generates and sends a first forward link signal to the user terminal, receiving the first forward link signal generated by the gateway station simulator and a fourth forward link signal received by the terminal radio frequency device through the server; and comparing the first forward link signal generated by the gateway station simulator with the fourth forward link signal received by the terminal radio frequency device through the server to obtain a comparison result corresponding to the first forward link signal.

As shown in fig. 6, an apparatus for testing performance of a satellite communication system according to an embodiment of the present disclosure includes a processor (processor)600 and a memory (memory) 601. Optionally, the apparatus may also include a Communication Interface 602 and a bus 603. The processor 600, the communication interface 602, and the memory 601 may communicate with each other via a bus 603. The communication interface 602 may be used for information transfer. The processor 600 may invoke logic instructions in the memory 601 to perform the method for testing the performance of a satellite communication system of the above-described embodiments.

In addition, the logic instructions in the memory 601 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 601 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 600 executes functional applications and data processing by executing program instructions/modules stored in the memory 601, i.e., implements the method for testing the performance of the satellite communication system in the above-described embodiments.

The memory 601 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 601 may include a high speed random access memory, and may also include a non-volatile memory.

By adopting the device for testing the performance of the satellite communication system provided by the embodiment of the disclosure, the transmission channels of the user link and the feeder link are respectively simulated by the user link channel simulator and the feeder link channel simulator, signal transmission is carried out by the radio frequency cable to establish the satellite communication system, and then a first reverse link signal sent to a gateway station is generated by the terminal simulator of the user terminal or a first forward link signal sent to the user terminal is generated by the gateway station simulator of the gateway station to obtain a comparison result for testing the performance of the satellite communication system, so as to realize the testing of the performance of the satellite communication system. Compared with the prior art, the satellite communication system does not need to be established by launching the in-orbit test satellite, and the test cost of the satellite communication system is reduced.

The embodiment of the disclosure provides equipment comprising the device for testing the performance of the satellite communication system. Optionally, the device is a computer, a tablet, a smartphone, a server, or the like. The device simulates transmission channels of a user link and a feeder link respectively through a user link channel simulator and a feeder link channel simulator, and performs signal transmission through a radio frequency cable to establish a satellite communication system, and then generates a first reverse link signal sent to a gateway station through a terminal simulator of a user terminal or generates a first forward link signal sent to the user terminal through a gateway station simulator of the gateway station to obtain a comparison result for testing the performance of the satellite communication system, so as to test the performance of the satellite communication system. Compared with the prior art, the satellite communication system does not need to be established by launching the in-orbit test satellite, and the test cost of the satellite communication system is reduced.

Embodiments of the present disclosure provide a computer-readable storage medium having stored thereon computer-executable instructions configured to perform the above-described method for testing performance of a satellite communication system.

Embodiments of the present disclosure provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above-described method for testing the performance of a satellite communication system.

The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.

The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.