阅读说明：本技术 用于卫星导航信号电磁环境分析的系统、方法及电子设备 (System, method and electronic device for satellite navigation signal electromagnetic environment analysis ) 是由 杜黎明 杨德森 武斌 杨军平 于 2020-12-21 设计创作，主要内容包括：本发明提供了一种用于卫星导航信号电磁环境分析的系统、方法及电子设备,涉及卫星导航技术领域,该系统包括：分别与数据分析处理单元连接的卫星信号监测接收单元、干扰频谱监测单元；卫星信号监测接收单元用于通过卫星信号接收天线接收导航卫星信号数据；干扰频谱监测单元,用于通过比幅天线和比相天线对干扰源进行识别定向；数据分析处理单元,用于对接收的导航卫星信号数据以及干扰源的识别定向结果进行分析,确定卫星导航信号电磁环境中是否存在电磁干扰以及电离层闪烁。该系统通过集成的干扰频谱监测单元和卫星信号监测接收单元能够显著提高弱干扰信号的监测能力,提高了对卫星信号质量下降原因判断的准确性。(The invention provides a system, a method and electronic equipment for satellite navigation signal electromagnetic environment analysis, which relate to the technical field of satellite navigation, and the system comprises: the satellite signal monitoring receiving unit and the interference frequency spectrum monitoring unit are respectively connected with the data analysis processing unit; the satellite signal monitoring receiving unit is used for receiving navigation satellite signal data through a satellite signal receiving antenna; the interference frequency spectrum monitoring unit is used for identifying and orienting the interference source through the amplitude comparison antenna and the phase comparison antenna; and the data analysis processing unit is used for analyzing the received navigation satellite signal data and the identification and orientation result of the interference source and determining whether electromagnetic interference and ionospheric scintillation exist in the electromagnetic environment of the satellite navigation signal. The system can remarkably improve the monitoring capability of weak interference signals through the integrated interference spectrum monitoring unit and the satellite signal monitoring receiving unit, and improves the accuracy of judging the satellite signal quality degradation reason.)

1. A system for satellite navigation signal electromagnetic environment analysis, the system comprising: the system comprises a data analysis processing unit, a satellite signal monitoring receiving unit and an interference spectrum monitoring unit; the satellite signal monitoring and receiving unit and the interference spectrum monitoring unit are respectively connected with the data analysis and processing unit;

the satellite signal monitoring and receiving unit is used for receiving navigation satellite signal data through a satellite signal receiving antenna, and the navigation satellite signal data comprises satellite signals and flash information thereof;

the interference frequency spectrum monitoring unit is used for identifying and orienting the interference source through the amplitude comparison antenna and the phase comparison antenna; the identification and orientation result of the interference source comprises the characteristics and the azimuth angle of the electromagnetic interference signal;

and the data analysis processing unit is used for analyzing the characteristics and the azimuth angle of the received electromagnetic interference signal, the satellite signal and the flicker information thereof and determining whether the electromagnetic interference and the ionospheric flicker exist in the electromagnetic environment of the satellite navigation signal.

2. The system for satellite navigation signal electromagnetic environment analysis of claim 1, wherein the satellite signal monitoring receiving unit comprises: the satellite signal receiving board card, the satellite signal receiving antenna and the radio frequency cable are arranged on the satellite signal receiving board card; the satellite signal receiving board card is connected with the satellite signal receiving antenna through the radio frequency cable;

the satellite signal receiving antenna is used for receiving navigation satellite signal information of the navigation satellite;

the satellite signal receiving board card is used for analyzing and processing navigation satellite signal information of the navigation satellite and determining navigation satellite signal data; wherein the navigation satellite signal data comprises at least: satellite coordinates, satellite states, satellite flicker effect information;

and the radio frequency cable is used for transmitting the navigation satellite signal data to the satellite signal receiving board card.

3. The system for satellite navigation signal electromagnetic environment analysis of claim 2, wherein the navigation satellite signal information comprises: one or more of carrier-to-noise ratio information, signal amplitude information, signal phase information, satellite ephemeris information, pseudorange information, time information, and position information.

4. The system for satellite navigation signal electromagnetic environment analysis of claim 1, wherein the interference spectrum monitoring unit comprises: the interference signal monitoring receiving board card, the amplitude comparison antenna and the phase comparison antenna; the amplitude comparison antenna and the phase comparison antenna are respectively connected with the interference signal monitoring receiving board card;

the amplitude comparison antenna is used for receiving the signal amplitude of the interference source and determining the direction of the interference source by comparing the signal amplitude of the interference source;

the phase comparison antenna is used for receiving the signal phase of the interference source and determining the direction of the interference source by comparing the signal phase of the interference source;

the interference signal monitoring and receiving board card is used for determining the identification and orientation result of the interference source according to the signal amplitude of the interference source and the signal phase of the interference source.

5. The system for satellite navigation signal electromagnetic environment analysis of claim 4, wherein the interference spectrum monitoring unit further comprises: an antenna switch;

one end of the antenna switch is connected with the interference signal monitoring and receiving board card; the other end of the antenna is connected with the amplitude comparison antenna and the phase comparison antenna respectively;

and the antenna switch is used for controlling the amplitude comparison antenna and the connection state of the phase comparison antenna and the interference signal monitoring and receiving board card.

6. The system for satellite navigation signal electromagnetic environment analysis of claim 1, wherein the navigation satellite signal frequency bands in the system comprise: one or more frequency bands contained in GPS, BDS, GLONASS, GALILEO or QZSS;

the data analysis processing unit analyzes and detects electromagnetic interference corresponding to one or more navigation satellite signal frequency bands contained in the GPS, the BDS, the GLONASS, the GALILEO or the QZSS.

7. The system for satellite navigation signal electromagnetic environment analysis of claim 1, further comprising: a data output unit; the data output unit is connected with the data analysis processing unit;

the data output unit comprises a data output interface, and the data output interface is used for outputting whether the satellite navigation signal electromagnetic environment has electromagnetic interference and ionospheric scintillation.

8. A method for analyzing an electromagnetic environment of a satellite navigation signal, wherein the method is used in the system for analyzing an electromagnetic environment of a satellite navigation signal according to any one of claims 1 to 7, and the system for analyzing an electromagnetic environment of a satellite navigation signal comprises a data analysis processing unit, a satellite signal monitoring receiving unit, and an interference spectrum monitoring unit; the method comprises the following steps:

receiving navigation satellite signal data through a satellite signal receiving antenna of the satellite signal monitoring receiving unit, and sending the navigation satellite signal data to the data analysis processing unit; the navigation satellite signal data comprises satellite signals and flicker information thereof;

identifying and orienting an interference source through a amplitude comparison antenna and a phase comparison antenna of the interference spectrum monitoring unit, and sending an identification and orientation result of the interference source to the data analysis and processing unit; wherein the identification and orientation result of the interference source comprises the characteristics and the azimuth angle of the electromagnetic interference signal;

and the data analysis processing unit analyzes the characteristics and the azimuth angle of the received electromagnetic interference signal, the satellite signal and the flicker information thereof, and determines whether the electromagnetic interference and the ionospheric scintillation exist in the electromagnetic environment of the satellite navigation signal.

9. An electronic device, comprising: a processor and a storage device; the storage means has stored thereon a computer program which, when being executed by the processor, carries out the steps of the method for satellite navigation signal electromagnetic environment analysis according to claim 8.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for satellite navigation signal electromagnetic environment analysis of claim 8.

Technical Field

The invention relates to the technical field of satellite navigation, in particular to a system and a method for analyzing an electromagnetic environment of a satellite navigation signal and electronic equipment.

Background

Key factors affecting the safety of a satellite navigation system include an electromagnetic interference environment and a space wave environment. The electromagnetic interference environment refers to various electromagnetic interference signals causing the performance reduction of the satellite navigation system, and comprises various unintended interference signals and man-made intentional interference signals; the space radio wave environment is a general term for elements affecting the satellite signal propagation environment, wherein ionospheric scintillation has the most serious influence on the satellite signal.

Because the influence of the ionosphere on satellite signal reception and the influence of electromagnetic interference on satellite signal reception have certain similarity, an effective judgment method is lacked in the prior art for judging whether the degradation of satellite signal quality is caused by ionosphere problems or electromagnetic interference.

Disclosure of Invention

In view of the above, the present invention provides a system, a method and an electronic device for analyzing an electromagnetic environment of a satellite navigation signal, which can significantly improve the monitoring capability of a weak interference signal through an interference spectrum monitoring unit and a satellite signal monitoring and receiving unit integrated in the system, achieve continuous monitoring of an electromagnetic signal in a coverage area range with high sensitivity, solve the problem in the prior art that an effective determination means is not available for a reason causing a reduction in satellite signal quality, and facilitate realization of an omnidirectional evaluation of an electromagnetic environment security situation of a navigation satellite space.

In a first aspect, an embodiment of the present invention provides an analysis system for a satellite navigation signal electromagnetic environment, where the system includes:

the system comprises a data analysis processing unit, a satellite signal monitoring receiving unit and an interference spectrum monitoring unit; the satellite signal monitoring and receiving unit and the interference spectrum monitoring unit are respectively connected with the data analysis and processing unit;

the satellite signal monitoring and receiving unit is used for receiving navigation satellite signal data through a satellite signal receiving antenna, and the navigation satellite signal data comprises satellite signals and flash information thereof;

the interference frequency spectrum monitoring unit is used for identifying and orienting the interference source through the amplitude comparison antenna and the phase comparison antenna, and the identification and orientation result of the interference source comprises the characteristics and the azimuth angle of the electromagnetic interference signal;

and the data analysis processing unit is used for analyzing the characteristics and the azimuth angle of the received electromagnetic interference signal, the satellite signal and the flicker information thereof and determining whether the electromagnetic interference exists in the electromagnetic environment of the satellite navigation signal and the ionospheric flicker exists.

In some embodiments, a satellite signal monitoring receiving unit, comprises: the satellite signal receiving board card, the satellite signal receiving antenna and the radio frequency cable are arranged on the satellite signal receiving board card; the satellite signal receiving board card is connected with the satellite signal receiving antenna through a radio frequency cable;

the satellite signal receiving antenna is used for receiving navigation satellite signal information of a navigation satellite;

the satellite signal receiving board card is used for analyzing and processing navigation satellite signal information of a navigation satellite and determining navigation satellite signal data; wherein the navigation satellite signal data comprises at least: satellite coordinates, satellite states, satellite flicker effect information;

and the radio frequency cable is used for transmitting the navigation satellite signal information data to the satellite signal receiving board card.

In some embodiments, navigation satellite signal information, comprises: one or more of carrier-to-noise ratio information, signal amplitude information, signal phase information, satellite ephemeris information, pseudorange information, time information, and position information.

In some embodiments, an interference spectrum monitoring unit, comprises: the interference signal monitoring receiving board card, the amplitude comparison antenna and the phase comparison antenna; the amplitude comparison antenna and the phase comparison antenna are respectively connected with the interference signal monitoring receiving board card;

the amplitude comparing antenna is used for receiving the signal amplitude of the interference source and determining the direction of the interference source by comparing the signal amplitude of the interference source;

the phase comparison antenna is used for receiving the signal phase of the interference source and determining the direction of the interference source by comparing the signal phase of the interference source;

and the interference signal monitoring receiving board card is used for determining the identification and orientation result of the interference source according to the signal amplitude of the interference source and the signal phase of the interference source.

In some embodiments, the interference spectrum monitoring unit further comprises: an antenna switch;

one end of the antenna switch is connected with the interference signal monitoring and receiving board card; the other end is respectively connected with the amplitude comparison antenna and the phase comparison antenna;

and the antenna switch is used for controlling the connection states of the amplitude comparison antenna, the phase comparison antenna and the interference signal monitoring receiving board card.

In some embodiments, the navigation satellite signal frequency band in the system comprises: one or more frequency bands contained in GPS, BDS, GLONASS, GALILEO or QZSS;

and the data analysis and processing unit is used for analyzing and detecting the electromagnetic interference corresponding to one or more navigation satellite signal frequency bands contained in the GPS, the BDS, the GLONASS, the GALILEO or the QZSS.

In some embodiments, the system further comprises: a data output unit; the data output unit is connected with the data analysis processing unit;

the data output unit comprises a data output interface which is used for outputting whether electromagnetic interference exists in the satellite navigation signal electromagnetic environment and ionospheric scintillation.

In a second aspect, an embodiment of the present invention provides a method for analyzing an electromagnetic environment of a satellite navigation signal, where the method is used in the system for analyzing an electromagnetic environment of a satellite navigation signal mentioned in the first aspect, and the system for analyzing an electromagnetic environment of a satellite navigation signal includes a data analysis processing unit, a satellite signal monitoring receiving unit, and an interference spectrum monitoring unit; the method comprises the following steps:

receiving navigation satellite signal data through a satellite signal receiving antenna of a satellite signal monitoring receiving unit, and sending the navigation satellite signal data to a data analysis processing unit; the navigation satellite signal data comprises satellite signals and flash information thereof;

identifying and orienting the interference source through a amplitude comparison antenna and a phase comparison antenna of the interference spectrum monitoring unit, and sending an identification and orientation result of the interference source to the data analysis and processing unit; the identification and orientation result of the interference source comprises the characteristics and the azimuth angle of the electromagnetic interference signal;

the data analysis processing unit analyzes the characteristics and the azimuth angle of the received electromagnetic interference signal, the satellite signal and the flicker information thereof, and determines whether the electromagnetic interference exists in the electromagnetic environment of the satellite navigation signal and the ionospheric flicker exists.

In a third aspect, an embodiment of the present invention further provides an electronic device, including: a processor and a memory; the memory has stored thereon a computer program which, when being executed by the processor, carries out the steps of the method for satellite navigation signal electromagnetic environment analysis mentioned in the second aspect above.

In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for satellite navigation signal electromagnetic environment analysis mentioned in the second aspect.

The embodiment of the invention has the following beneficial effects:

the invention provides a system, a method and electronic equipment for satellite navigation signal electromagnetic environment analysis, wherein the system comprises: the system comprises a data analysis processing unit, a satellite signal monitoring receiving unit and an interference spectrum monitoring unit; the satellite signal monitoring and receiving unit and the interference spectrum monitoring unit are respectively connected with the data analysis and processing unit; the satellite signal monitoring and receiving unit is used for receiving navigation satellite signal data through a satellite signal receiving antenna and sending the navigation satellite signal data to the data analysis and processing unit for processing; the interference frequency spectrum monitoring unit is used for identifying and orienting the interference source through the amplitude comparison antenna and the phase comparison antenna, wherein the identification and orientation result of the interference source comprises the characteristics and the azimuth angle of the electromagnetic interference signal, and the identification and orientation result of the interference source is sent to the data analysis and processing unit for processing; and the data analysis processing unit is used for analyzing the received navigation satellite signal data and the identification and orientation result of the interference source, determining whether electromagnetic interference and ionospheric scintillation exist in the electromagnetic environment of the satellite navigation signal, and judging whether the electromagnetic interference of the navigation satellite is caused by the ionospheric scintillation or the electromagnetic interference. The system can remarkably improve the monitoring capability of weak interference signals through the integrated interference spectrum monitoring unit and the satellite signal monitoring and receiving unit, can continuously monitor electromagnetic signals in a coverage area range with high sensitivity, solves the problem that effective judgment means is lacked for the reason of causing satellite signal quality reduction in the prior art, and is favorable for realizing the all-round evaluation of the electromagnetic environment safety situation of a navigation satellite space.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention as set forth above.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a first system for satellite navigation signal electromagnetic environment analysis according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second system for satellite navigation signal electromagnetic environment analysis according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a third system for electromagnetic environment analysis of satellite navigation signals according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a fourth system for electromagnetic environment analysis of satellite navigation signals according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating an example of use of a system for satellite navigation signal electromagnetic environment analysis provided by an embodiment of the present invention;

FIG. 6 is a flowchart of a method for electromagnetic environment analysis of satellite navigation signals according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Icon:

100-a data analysis processing unit; 200-satellite signal monitoring receiving unit; 300-an interference spectrum monitoring unit; 400-a data output unit; 500-a system for satellite navigation signal electromagnetic environment analysis; 600-a source of interference; 210-a satellite signal receiving board card; 220-satellite signal receiving antenna; 230-a radio frequency cable; 310-interference signal monitoring receiving board card; 320-amplitude-contrast antenna; a 330-phase comparison antenna; 340-an antenna switch; 101-a processor; 102-a memory; 103-a bus; 104-communication interface.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Key factors affecting the safety of a satellite navigation system include an electromagnetic interference environment and a space wave environment. The electromagnetic interference environment refers to various electromagnetic interference signals causing the performance reduction of the satellite navigation system, and comprises various unintended interference signals and man-made intentional interference signals; the space radio wave environment is a general term for elements affecting the satellite signal propagation environment, wherein ionospheric scintillation has the most serious influence on the satellite signal.

The electromagnetic environment influence of a satellite navigation system is mainly monitored by means of general equipment at present, and a mode that a spectrum analyzer is directly connected with a satellite navigation antenna or a monitoring receiver is connected with a wide-band monitoring antenna is generally adopted. However, both of these methods cannot solve the problem of monitoring the influence of space radio wave environment. Because the influence of the ionosphere on satellite signal reception and the influence of electromagnetic interference on satellite signal reception have certain similarity, it cannot be determined whether the degradation of satellite signal quality is caused by ionosphere problems or electromagnetic interference in many cases.

Based on this, the embodiment of the invention provides a system, a method and an electronic device for analyzing the electromagnetic environment of a satellite navigation signal, which can significantly improve the monitoring capability of a weak interference signal through an interference spectrum monitoring unit and a satellite signal monitoring receiving unit integrated in the system, realize continuous monitoring of the electromagnetic signal in a coverage area range under high sensitivity, solve the problem of lack of effective judgment means for the reason of satellite signal quality reduction in the prior art, and facilitate the realization of omnibearing evaluation of the electromagnetic environment safety situation of a navigation satellite space.

For the understanding of the present embodiment, a detailed description will be given to a system for satellite navigation signal electromagnetic environment analysis disclosed in the embodiment of the present invention.

Referring to fig. 1, a first system for electromagnetic environment analysis of satellite navigation signals is shown, which comprises: the system comprises a data analysis processing unit 100, a satellite signal monitoring receiving unit 200 and an interference spectrum monitoring unit 300; the satellite signal monitoring and receiving unit 200 and the interference spectrum monitoring unit 300 are respectively connected with the data analysis and processing unit 100;

the satellite signal monitoring and receiving unit 200 is configured to receive navigation satellite signal data through a satellite signal receiving antenna, and send the navigation satellite signal data to the data analysis and processing unit 100 for processing; the navigation satellite signal data comprises satellite signals and flicker information thereof;

the interference spectrum monitoring unit 300 is configured to identify and orient an interference source through the amplitude comparison antenna and the phase comparison antenna, and send an identification and orientation result of the interference source to the data analysis processing unit for processing 100; the identification and orientation result of the interference source comprises the characteristics and the azimuth angle of the electromagnetic interference signal;

and the data analysis processing unit 100 is configured to analyze the characteristics and the azimuth of the received electromagnetic interference signal, the satellite signal and the scintillation information thereof, and determine whether electromagnetic interference and ionospheric scintillation exist in the electromagnetic environment of the satellite navigation signal.

Specifically, the data analysis processing unit 100 mainly implements functions such as system control, interface management, and data processing. The data analysis processing unit 100 may adopt a satellite navigation signal and electromagnetic interference signal joint analysis and evaluation technology to comprehensively analyze and process the electromagnetic interference information and the satellite signal information obtained by the system monitoring through a data fusion algorithm, so as to provide a service for analyzing and evaluating the electromagnetic environment influence.

The functions of the data analysis processing unit 100 are mainly embodied in the following four aspects:

first, it is determined whether an interference signal exists. The characteristics of the interference signal and a possible radiation source are rapidly identified by monitoring, analyzing and identifying the time domain, the frequency domain, the space domain, the modulation characteristics, the modulation parameters and the like of the electromagnetic interference signal, analyzing the characteristic quantity of the electromagnetic interference signal, comparing the characteristic quantity with the characteristic quantity of a basic signal database signal, and making a rapid, flexible and accurate reaction; and if the unknown signal is detected, analyzing and modeling the signal characteristics of the unknown signal, establishing an interference signal frequency spectrum template, and storing the characteristics in a database to form an interference database. A known signal base is established on a frequency domain and can be used as a criterion for judging whether interference signals exist. For the same-frequency interference signal, the change of a demodulation domain and a code domain is observed by methods of demodulation, an eye diagram, a bit error rate, circular spectrum filtering and the like, and whether the interference signal exists is judged. The signals are classified and identified. For the interference source, more signal information is acquired, so that the signals are accurately identified and classified.

And secondly, monitoring, analyzing and judging satellite signal state information. Whether the satellite is affected by suppression interference and deception interference is judged by analyzing signal information of the navigation satellite, such as carrier-to-noise ratio information, signal amplitude information, signal phase information, satellite ephemeris information, pseudo-range information, time information, position information and the like, and monitoring of electromagnetic interference signals is assisted.

Thirdly, the influence of the satellite signal flicker on different satellite navigation signals is analyzed. Satellite signal flicker refers to amplitude fading of radio signals traversing an ionized layer caused by an inhomogeneous body of the ionized layer, signal-to-noise ratio of a channel is reduced, and bit error rate is increased. And obtaining an amplitude flicker index and a phase flicker index of ionosphere influence by analyzing satellite signal information, thereby further analyzing the influence of ionosphere flicker on a satellite navigation signal channel.

And fourthly, fusion analysis of the multivariate information, namely, fusion of data information is realized by adopting a multivariate information fusion algorithm based on the result, so that an accurate and effective fusion analysis result is obtained.

According to the system for analyzing the satellite navigation signal electromagnetic environment provided by the embodiment, the system integrates the interference spectrum monitoring unit and the satellite signal monitoring and receiving unit, the monitoring capability of weak interference signals can be obviously improved through the interference spectrum monitoring unit and the satellite signal monitoring and receiving unit, continuous monitoring on electromagnetic signals in a coverage area range under high sensitivity is realized, the problem that effective judgment means is lacked for reasons causing satellite signal quality reduction in the prior art is solved, and the system is favorable for comprehensively evaluating the electromagnetic environment safety situation of a navigation satellite space.

Referring to fig. 2, a schematic structural diagram of a second system for satellite navigation signal electromagnetic environment analysis, a satellite signal monitoring receiving unit 200 includes: a satellite signal receiving board 210, a satellite signal receiving antenna 220 and a radio frequency cable 230; the satellite signal receiving board 210 is connected to a satellite signal receiving antenna 220 through a radio frequency cable 230.

The satellite signal receiving antenna 220 is configured to receive navigation satellite signal information of a navigation satellite; the satellite signal receiving board 210 is configured to collect and arrange navigation satellite signal information of a navigation satellite, and determine navigation satellite signal data; and the radio frequency cable 230 is used for transmitting the navigation satellite signal information to the satellite signal receiving board. In most usage scenarios, the satellite signal receiving antenna 220 receives civil frequency bands in satellite navigation signals, and in the implementation process, the frequency bands of the navigation satellite signals include: one or more frequency bands included in GPS (Global Positioning System), BDS (BeiDou Navigation Satellite System), GLONASS (Global Navigation Satellite SATELLITE SYSTEM), GALILEO (GALILEO Satellite Navigation System), or QZSS (Quasi-Zenith Satellite System). And the data analysis and processing unit is used for analyzing and detecting the electromagnetic interference corresponding to one or more navigation satellite signal frequency bands contained in the GPS, the BDS, the GLONASS, the GALILEO or the QZSS.

In the specific implementation process, the navigation satellite signal information input to the satellite signal receiving board card comprises the following steps: one or more of carrier-to-noise ratio information, signal amplitude information, signal phase information, satellite ephemeris information, pseudorange information, and time information position information.

By analyzing the signal information of the navigation satellite, such as carrier-to-noise ratio information, signal amplitude information, signal phase information, satellite ephemeris information, pseudo-range information, time information, position information and the like, whether the satellite is affected by suppression interference and deception interference is judged, and monitoring of electromagnetic interference signals is assisted.

The interference spectrum monitoring unit 300 includes: the interference signal monitoring receiving board 310, the amplitude comparison antenna 320 and the phase comparison antenna 330; the amplitude comparing antenna 320 and the phase comparing antenna 330 are respectively connected to the interference signal monitoring receiving board 310. The amplitude comparing antenna 320 is used for receiving the signal amplitude of the interference source and determining the direction of the interference source by comparing the signal amplitude of the interference source; a phase comparison antenna 330 for receiving the signal phase of the interference source and determining the direction of the interference source by comparing the signal phase of the interference source; the interference signal monitoring receiving board 310 is configured to determine an identification and orientation result of the interference source according to the signal amplitude of the interference source and the signal phase of the interference source.

The interference frequency spectrum monitoring unit is used for realizing the receiving processing, direction finding and positioning of electromagnetic interference signals, and the amplitude comparison and phase comparison direction finding technologies can be organically combined through a correlation algorithm, so that the requirements of high-sensitivity monitoring and high-precision direction finding can be met.

Referring to fig. 3, a schematic structural diagram of a third system for satellite navigation signal electromagnetic environment analysis is shown.

In some embodiments, the interference spectrum monitoring unit further comprises: an antenna switch 340; one end of the antenna switch 340 is connected to the interference signal monitoring and receiving board 310; the other end is respectively connected with the amplitude comparison antenna 320 and the phase comparison antenna 330; and the antenna switch 340 is used for controlling the connection states of the amplitude comparison antenna, the phase comparison antenna and the interference signal monitoring receiving board card.

The addition of antenna switch 340 allows for better control of amplitude antenna 320 and phase antenna 330 during analysis of the electromagnetic environment for better analysis of the electromagnetic environment.

Referring to fig. 4, a schematic structural diagram of a fourth system for satellite navigation signal electromagnetic environment analysis is shown, the system further comprising: a data output unit 400; the data output unit 400 is connected with the data analysis processing unit 100; the data output unit 400 includes a data output interface for outputting whether there is electromagnetic interference and ionospheric scintillation in the satellite navigation signal electromagnetic environment.

According to the system for analyzing the electromagnetic environment of the satellite navigation signal, provided by the embodiment, the interference spectrum monitoring unit and the satellite signal monitoring and receiving unit of the system can obviously improve the monitoring capability of weak interference signals, and the system also has a comprehensive data analysis and processing terminal for carrying out fusion processing on interference spectrum monitoring data and satellite signal monitoring data, so that comprehensive monitoring analysis and identification on electromagnetic interference and signal self abnormity are realized. The electromagnetic signal in the coverage area can be continuously monitored with high sensitivity in a sufficiently wide frequency range, the overall understanding of the electromagnetic environment situation of the area space is realized, and the electromagnetic environment frequency spectrum state management aiming at the satellite navigation system is realized. The safety situation assessment function of the space electromagnetic environment is realized by carrying out real-time multi-domain analysis and panoramic monitoring on the space electromagnetic environment signals; on the basis of real-time multi-domain signal analysis and safety situation assessment of the space electromagnetic environment, the space electromagnetic environment early warning function is achieved. The system solves the problem that effective judgment means is lacked for the reason causing the satellite signal quality reduction in the prior art, and is beneficial to the realization of the omnibearing evaluation of the electromagnetic environment safety situation of the navigation satellite space.

The embodiment of the present invention further provides a method for analyzing an electromagnetic environment of a satellite navigation signal, where the method is used in the system for analyzing an electromagnetic environment of a satellite navigation signal mentioned in the above embodiment, a schematic diagram of a use example of the system is shown in fig. 5, and a system 500 for analyzing an electromagnetic environment of a satellite navigation signal includes a data analysis processing unit, a satellite signal monitoring receiving unit, and an interference spectrum monitoring unit; wherein the satellite signal receiving antenna 220 of the satellite signal monitoring receiving unit, the amplitude comparing antenna 320 and the phase comparing antenna 330 of the interference spectrum monitoring unit identify and orient the interference source 600. Specifically, the flowchart of the method is shown in fig. 6, and includes:

step S601, receiving navigation satellite signal data through a satellite signal receiving antenna of a satellite signal monitoring receiving unit, and sending the navigation satellite signal data to a data analysis processing unit;

step S602, identifying and orienting the interference source through the amplitude comparison antenna and the phase comparison antenna of the interference spectrum monitoring unit, and sending the identification and orientation result of the interference source to the data analysis processing unit.

Step S601 and step S602 are in parallel, and in the actual implementation process, step S601 and step S602 are not in progressive relation, and the data obtained by each step is sent to the data analysis processing unit.

Step S603, the data analysis processing unit analyzes the received navigation satellite signal data and the identification and orientation result of the interference source, and determines whether there is electromagnetic interference and ionospheric scintillation in the satellite navigation signal electromagnetic environment.

Specifically, the analysis of the satellite signals and the scintillation information thereof is divided into two steps: the first step is single-station data processing, comprising: judging whether an interference signal exists, analyzing the state of a satellite signal, analyzing the scintillation effect of the satellite signal, and performing fusion analysis and analysis of influence reasons; and the second step is data fusion analysis of multi-station information, namely firstly, a reasonable data fusion optimization method needs to be determined, and secondly, the data fusion problem under the condition of information conflict needs to be solved.

When the interference source 600 emits an interference signal, the amplitude comparing antenna 320 and the phase comparing antenna 330 of the system 500 for satellite navigation signal electromagnetic environment analysis identify and orient the interference source; the satellite signal receiving antenna 220 receives satellite signals and determines whether the satellite is affected by jamming or deception jamming by analyzing satellite signal information, including carrier-to-noise ratio information, signal amplitude information, signal phase information, satellite ephemeris information, pseudorange information, time information, position information, and the like.

When the quality of the satellite signal received by the satellite signal receiving antenna 220 is degraded, the positioning error is large, and even the lock is lost, and the amplitude comparing antenna 320 and the phase comparing antenna 330 do not receive the interference signal, it is determined that the ionospheric scintillation occurs, and it is determined that the degradation of the satellite signal quality is caused by the ionospheric scintillation.

The method for analyzing the electromagnetic environment of the satellite navigation signal provided by the embodiment of the invention has the same technical characteristics as the system for analyzing the electromagnetic environment of the satellite navigation signal provided by the embodiment, so that the same technical problems can be solved, and the same technical effect can be achieved. For the sake of brevity, where not mentioned in the section of the embodiments, reference may be made to the corresponding matters in the foregoing embodiments.

The embodiment also provides an electronic device, a schematic structural diagram of which is shown in fig. 7, and the electronic device includes a processor 101 and a memory 102; the memory 102 is configured to store one or more computer instructions, which are executed by the processor to implement the above-described method for satellite navigation signal electromagnetic environment analysis.

The electronic device shown in fig. 7 further comprises a bus 103 and a communication interface 104, the processor 101, the communication interface 104 and the memory 102 being connected via the bus 103.

The Memory 102 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Bus 103 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 7, but this does not indicate only one bus or one type of bus.

The communication interface 104 is configured to connect with at least one user terminal and other network units through a network interface, and send the packaged IPv4 message or IPv4 message to the user terminal through the network interface.

The processor 101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 101. The Processor 101 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps, and logic blocks disclosed in the embodiments of the present disclosure may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present disclosure may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 102, and the processor 101 reads the information in the memory 102 and completes the steps of the method of the foregoing embodiment in combination with the hardware thereof.

Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs the steps of the method of the foregoing embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of 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 of devices or units through some communication interfaces, 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 achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention 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 functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention or a part thereof, which essentially contributes to the prior art, can be embodied in the form of a software product stored in a storage medium and including instructions for causing 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 according to the embodiments of the present invention. And the aforementioned storage medium includes: 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.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.