阅读说明：本技术 星载sar收发链路相位抖动问题定位方法 (Satellite-borne SAR transceiving link phase jitter problem positioning method ) 是由 矫远波 刘开雨 王宇 于 2019-08-01 设计创作，主要内容包括：本发明公开了一种星载SAR收发链路相位抖动问题定位方法,包括：获取第一主收发链路对应的第一主相位历程和第一备收发链路对应的第一备相位历程；先确定所述第一主收发链路中第一单机的主机是否存在故障；所述第一单机的主机的故障检测完成后再确定所述第一备收发链路中所述第一单机的备机是否存在故障；或者,先确定所述第一所述第一备收发链路中第一单机的备机是否存在故障；所述第一单机的备机的故障检测完成后再确定所述第一主收发链路中所述第一单机的主机是否存在故障。本发明的方案能够定位导致星载SAR收发链路相位抖动问题的单机故障,并进一步在定位出单机故障后可以及时进行维修以排除故障,为单机故障问题快速定位节约了时间。(The invention discloses a satellite-borne SAR transceiving link phase jitter problem positioning method, which comprises the following steps: acquiring a first main phase process corresponding to a first main transceiving link and a first standby phase process corresponding to a first standby transceiving link; firstly, determining whether a host of a first stand-alone machine in the first main transceiving link has a fault; after the fault detection of the host of the first stand-alone machine is completed, determining whether a standby machine of the first stand-alone machine in the first standby transceiving link has a fault; or, determining whether a standby machine of a first stand-alone machine in the first standby transceiving link has a fault; and determining whether the host of the first stand-alone machine in the first main transceiving link has a fault after the fault detection of the standby machine of the first stand-alone machine is completed. The scheme of the invention can position the single machine fault which causes the phase jitter problem of the satellite-borne SAR receiving and transmitting link, and further can carry out maintenance in time to remove the fault after the single machine fault is positioned, thereby saving time for rapidly positioning the single machine fault problem.)

1. A satellite-borne Synthetic Aperture Radar (SAR) receiving and transmitting link phase jitter problem positioning method is characterized by comprising the following steps:

acquiring a first main phase process corresponding to a first main transceiving link of a first transceiving link and a first standby phase process corresponding to a first standby transceiving link of the first transceiving link; the first transceiving link is formed by connecting a frequency modulation signal source, a pre-power amplifier, an adjustable attenuator, a microwave combination, a radar receiver and a data former;

firstly, determining whether a host of a first stand-alone machine in the first main transceiving link has a fault; after the fault detection of the host of the first stand-alone machine is completed, determining whether a standby machine of the first stand-alone machine in the first standby transceiving link has a fault; or, determining whether a standby machine of a first stand-alone machine in the first standby transceiving link has a fault; after the fault detection of the standby machine of the first stand-alone machine is finished, determining whether the main machine of the first stand-alone machine in the first main transceiving link has a fault; the first single machine is one of the following single machines: the pre-power amplifier, the microwave combination and the radar receiver; wherein the content of the first and second substances,

under the condition that a standby machine of the first stand-alone machine is not arranged in the first standby transceiving link, when the first main phase process has jitter and the first standby phase process has no jitter, determining that a host of the first stand-alone machine has a fault;

and under the condition that the host of the first stand-alone machine is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the first stand-alone machine has a fault.

2. The method of claim 1, wherein in the case of a standby machine without the pre-power amplifier in the first standby transceiving link, determining that a host of the pre-power amplifier has a fault when there is jitter in the first main phase history and there is no jitter in the first standby phase history;

alternatively, the first and second electrodes may be,

and under the condition that the host of the pre-power amplifier is not arranged in the first main transceiving link, when the first standby phase history has jitter and the first main phase history has no jitter, determining that the standby machine of the pre-power amplifier has a fault.

3. The method of claim 1, wherein in a case that a standby machine of the microwave combination is not provided in the first standby transceiving link, when there is jitter in the first main phase history and there is no jitter in the first standby phase history, determining that there is a failure in a host machine of the microwave combination;

alternatively, the first and second electrodes may be,

and under the condition that the host of the microwave combination is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the microwave combination has a fault.

4. The method of claim 1, wherein in the case that a backup machine of the radar receiver is not provided in the first backup transceiving link, determining that a host of the radar receiver has a fault when there is jitter in the first main phase history and there is no jitter in the first backup phase history;

alternatively, the first and second electrodes may be,

and under the condition that the main machine of the radar receiver is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the radar receiver has a fault.

5. The method of claim 1, wherein before obtaining the first master phase history corresponding to the first master transceiving link of the first transceiving link and the first slave phase history corresponding to the first slave transceiving link of the first transceiving link, the method further comprises:

acquiring a second main phase process corresponding to a second main transceiving link of a second transceiving link and a second standby phase process corresponding to a second standby transceiving link of the second transceiving link; the second transceiving link is formed by connecting the frequency modulation signal source, the adjustable attenuator and the data former;

judging whether the second main phase process and the second auxiliary phase process have phase jitter or not to obtain a second judgment result;

and when the second judgment result represents that the second main phase process and the second standby phase process have no phase jitter, determining that the single machine fault does not exist in the frequency modulation signal source.

6. The method of claim 5, further comprising:

when the second judgment result represents that phase jitter exists in the second main phase process, the frequency modulation signal source is determined to be a single fault machine, and a host of the frequency modulation signal source has a fault; alternatively, the first and second electrodes may be,

and when the second judgment result represents that the second standby phase process has phase jitter, determining that the frequency modulation signal source is a single fault machine and the standby machine of the frequency modulation signal source has a fault.

7. The method according to any one of claims 1 to 6, wherein it is determined that phase jitter is present in the respective phase history when the phase stability indicator of the respective phase history is determined to be greater than 0.5 °.

Technical Field

The invention relates to the field of Radar microwave remote sensing, in particular to a method for positioning phase jitter of a receiving and transmitting link of a satellite-borne Synthetic Aperture Radar (SAR).

Background

The double-base satellite-borne SAR is a technology which adopts formation satellites to form a base line and obtains surface elevation information through interference processing. The double stars fly repeatedly independently or in formation, and the ground surface deformation is obtained by using a three-rail method. Specifically, as shown in fig. 1, a satellite navigates through the same target area for multiple times, and observes the same target area for multiple times over a long time, and uses the phase information included in the obtained SAR complex image sequence to obtain the accurate deformation information of the earth's surface occurring within the observation time by using an advanced signal processing method. The interference imaging processing has the characteristic of being sensitive to phase information and requires good phase stability of radar emission signals.

And backup design is carried out inside each single machine in the satellite-borne SAR transceiving link. Therefore, the single machine equipment is internally divided into a host machine and a standby machine; the transceiving link is divided into a main transceiving link and a standby transceiving link. As shown in fig. 2, the chirped signal output by the fm signal source is input to the microwave combination after being adjusted in power by the pre-power amplifier and the adjustable attenuator, the microwave combination outputs the input signal to the data generator through the radar receiver, and the data generator converts the input microwave signal into a digital signal, i.e., radar data; and carrying out digital pulse compression processing on the radar data to further obtain the phase process of the transceiving link.

The overall design of the radar enables each single machine in the satellite-borne SAR receiving and transmitting link to meet the phase stability requirement, and in the debugging, testing and acceptance testing process of each single machine device, as shown in fig. 3, a vector network analyzer can be used for testing the transmitting phase of a frequency modulation signal source and a pre-power amplifier and the receiving phase of a radar receiver in the receiving and transmitting link to obtain phase nonlinearity and phase stability indexes in a working frequency band; the microwave combination in the transceiving link is a passive single machine, and the influence of the internal circuit on the phase characteristics can be ignored. In the single machine debugging, testing and acceptance testing stage of the application, index testing is carried out on the phase characteristics of each single machine, and the actually measured phase stability index is qualified (namely the requirement of satellite-borne SAR interference imaging is met), and is within 0.2 degrees. However, in the integrated test stage of the transceiving link, the main phase history corresponding to the main transceiving link and the standby phase history corresponding to the standby transceiving link have the jitter problem, the phase stability index is degraded to 2 degrees, and the requirement of satellite-borne SAR interferometric imaging is not met.

In addition, the integrated test method of the transceiving link in the related art cannot locate a single fault machine causing the problem of phase process jitter.

Disclosure of Invention

In view of this, the embodiment of the present invention provides a method for positioning phase jitter problem of a satellite-borne SAR transceiving link.

The technical scheme of the embodiment of the invention is realized as follows:

the embodiment of the invention provides a method for positioning the phase jitter problem of a satellite-borne SAR transceiving link, which comprises the following steps:

acquiring a first main phase process corresponding to a first main transceiving link of a first transceiving link and a first standby phase process corresponding to a first standby transceiving link of the first transceiving link; the first transceiving link is formed by connecting a frequency modulation signal source, a pre-power amplifier, an adjustable attenuator, a microwave combination, a radar receiver and a data former;

firstly, determining whether a host of a first stand-alone machine in the first main transceiving link has a fault; after the fault detection of the host of the first stand-alone machine is completed, determining whether a standby machine of the first stand-alone machine in the first standby transceiving link has a fault; or, determining whether a standby machine of a first stand-alone machine in the first standby transceiving link has a fault; after the fault detection of the standby machine of the first stand-alone machine is finished, determining whether the main machine of the first stand-alone machine in the first main transceiving link has a fault; the first single machine is one of the following single machines: the pre-power amplifier, the microwave combination and the radar receiver; wherein the content of the first and second substances,

under the condition that a standby machine of the first stand-alone machine is not arranged in the first standby transceiving link, when the first main phase process has jitter and the first standby phase process has no jitter, determining that a host of the first stand-alone machine has a fault;

and under the condition that the host of the first stand-alone machine is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the first stand-alone machine has a fault.

In the above scheme, when the first standby transceiving link is not provided with the standby machine of the pre-power amplifier, and when the first main phase history has jitter and the first standby phase history has no jitter, it is determined that the main machine of the pre-power amplifier has a fault;

alternatively, the first and second electrodes may be,

and under the condition that the host of the pre-power amplifier is not arranged in the first main transceiving link, when the first standby phase history has jitter and the first main phase history has no jitter, determining that the standby machine of the pre-power amplifier has a fault.

In the above scheme, when the first master phase history has jitter and the first slave phase history has no jitter, it is determined that the master of the microwave combination has a fault, if the first slave transceiver link has no spare of the microwave combination;

alternatively, the first and second electrodes may be,

and under the condition that the host of the microwave combination is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the microwave combination has a fault.

In the above scheme, when the first standby transceiving link is not provided with a standby machine of the radar receiver, and when the first main phase history has jitter and the first standby phase history has no jitter, it is determined that a host of the radar receiver has a fault;

alternatively, the first and second electrodes may be,

and under the condition that the main machine of the radar receiver is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the radar receiver has a fault.

In the foregoing solution, before obtaining a first master phase history corresponding to a first master transceiving link of a first transceiving link and a first slave phase history corresponding to a first slave transceiving link of the first transceiving link, the method further includes:

acquiring a second main phase process corresponding to a second main transceiving link of a second transceiving link and a second standby phase process corresponding to a second standby transceiving link of the second transceiving link; the second transceiving link is formed by connecting the frequency modulation signal source, the adjustable attenuator and the data former;

judging whether the second main phase process and the second auxiliary phase process have phase jitter or not to obtain a second judgment result;

and when the second judgment result represents that the second main phase process and the second standby phase process have no phase jitter, determining that the single machine fault does not exist in the frequency modulation signal source.

In the above scheme, the method further comprises:

when the second judgment result represents that phase jitter exists in the second main phase process, the frequency modulation signal source is determined to be a single fault machine, and a host of the frequency modulation signal source has a fault; alternatively, the first and second electrodes may be,

and when the second judgment result represents that the second standby phase process has phase jitter, determining that the frequency modulation signal source is a single fault machine and the standby machine of the frequency modulation signal source has a fault.

In the above scheme, when the phase stability index of the corresponding phase history is determined to be greater than 0.5 °, it is determined that the corresponding phase history has phase jitter.

According to the technical scheme provided by the embodiment of the invention, a first main phase process corresponding to a first main transceiving link of a first transceiving link and a first standby phase process corresponding to a first standby transceiving link of the first transceiving link are obtained; the first transceiving link is formed by connecting a frequency modulation signal source, a pre-power amplifier, an adjustable attenuator, a microwave combination, a radar receiver and a data former; firstly, determining whether a host of a first stand-alone machine in the first main transceiving link has a fault; after the fault detection of the host of the first stand-alone machine is completed, determining whether a standby machine of the first stand-alone machine in the first standby transceiving link has a fault; or, determining whether a standby machine of a first stand-alone machine in the first standby transceiving link has a fault; after the fault detection of the standby machine of the first stand-alone machine is finished, determining whether the main machine of the first stand-alone machine in the first main transceiving link has a fault; the first single machine is one of the following single machines: the pre-power amplifier, the microwave combination and the radar receiver; when the first main phase process has jitter and the first standby phase process has no jitter, determining that a host of the first stand-alone machine has a fault; and under the condition that the host of the first stand-alone machine is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the first stand-alone machine has a fault. According to the scheme of the embodiment of the invention, as the failure detection is respectively carried out on the pre-power amplifier, the microwave combination and the host machine and the standby machine of the radar receiver, the single machine failure causing the phase jitter problem of the satellite-borne SAR receiving and transmitting link can be positioned, and further, the single machine failure can be timely maintained to remove the failure after being positioned, so that the time is saved for quickly positioning the single machine failure problem.

Drawings

FIG. 1 is a schematic diagram of multi-pass differential interference imaging of a satellite of a space-borne SAR;

FIG. 2 is a schematic diagram of the working principle of a satellite-borne SAR transceiving link;

FIG. 3 is a schematic diagram of phase testing of each single machine of a satellite-borne SAR transceiving link;

fig. 4 is a first flowchart of a method for positioning a phase jitter problem of a satellite-borne SAR transmit-receive link according to an embodiment of the present invention;

FIG. 5 is a schematic flow chart of a method for positioning the phase jitter problem of the satellite-borne SAR transmit-receive link according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of a troubleshooting connection of a frequency modulated signal source in an embodiment of the invention;

FIG. 7 is a schematic diagram of a troubleshooting connection of a host of a pre-power amplifier according to an embodiment of the invention;

FIG. 8 is a flowchart of a stand-alone equipment problem location of a transceiving link according to an embodiment of the present invention;

FIG. 9 is a flowchart of a problem location process of a transceiving link according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.

In various embodiments of the present invention, the phase jitter problem is located in the integrated test state of the transmit-receive link of the satellite-borne SAR, and through the troubleshooting process of locating the problems of the single units (including the host and the standby unit) one by one, that is, it is determined whether the host of a single unit has a fault or not, and then it is determined whether the standby unit of the single unit has a fault or not (or it is determined whether the standby unit of the single unit has a fault or not, and then it is determined whether the host of the single unit has a fault or not), and after it is determined that neither the host nor the standby unit of the single unit has a fault, it is determined whether the next single unit. So, can accomplish the location of unit trouble problem as early as possible, if a certain unit has the trouble, the user can in time maintain in order to get rid of the trouble, need not to wait for the problem location of other units (including host computer and standby machine), has practiced thrift the time for the quick location problem of unit and the trouble of getting rid of.

In various embodiments of the invention, when judging whether a host of a single machine has a fault, the host of the single machine is connected to a main transceiving link, a standby machine of the single machine is configured not to be connected with a standby transceiving link, and the phase processes of the main transceiving link and the standby transceiving link are compared to determine whether the jitter exists or not so as to locate the fault of the single machine; specifically, when the phase history of the main transceiving link has jitter and the phase history of the standby transceiving link does not have jitter, it is determined that the host of the single machine has a fault. When judging whether the standby machine of a single machine has a fault, connecting the standby machine to a standby transceiving link, configuring a host machine of the single machine not to be connected with a main transceiving link, comparing whether the phase processes of the main transceiving link and the standby transceiving link have jitter, and determining that the standby machine of the single machine has the fault when the phase processes of the main transceiving link and the standby transceiving link have jitter.

In various embodiments of the present invention, the threshold value of the phase stability indicator for determining whether the phase histories of the transceiving links are jittered is set to 0.5 °, that is, when the phase stability indicator of the phase histories of the transceiving links is greater than 0.5 °, it is determined that the phase histories of the transceiving links are jittered, and when the phase stability indicator of the phase histories of the transceiving links is less than or equal to 0.5 °, it is determined that the transceiving links are stable (i.e., there is no jitter). In practical application, the phase stability index threshold may be other values, and may be set by the user according to the requirement.

The embodiment of the invention provides a method for positioning the phase jitter problem of a satellite-borne SAR transceiving link, which comprises the following steps as shown in figure 4:

step 401: acquiring a first main phase process corresponding to a first main transceiving link of a first transceiving link and a first standby phase process corresponding to a first standby transceiving link of the first transceiving link;

here, the first transceiving link is formed by connecting a frequency modulation signal source, a pre-power amplifier, an adjustable attenuator, a microwave combination, a radar receiver and a data former.

Step 402: firstly, determining whether a host of a first stand-alone machine in the first main transceiving link has a fault; after the fault detection of the host of the first stand-alone machine is completed, determining whether a standby machine of the first stand-alone machine in the first standby transceiving link has a fault; or, determining whether a standby machine of a first stand-alone machine in the first standby transceiving link has a fault; after the fault detection of the standby machine of the first stand-alone machine is finished, determining whether the main machine of the first stand-alone machine in the first main transceiving link has a fault;

here, the first stand-alone is one of the following stands-alone: the pre-power amplifier, the microwave combination and the radar receiver;

when the first main phase process has jitter and the first standby phase process has no jitter, determining that a host of the first stand-alone machine has a fault;

and under the condition that the host of the first stand-alone machine is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the first stand-alone machine has a fault.

In an embodiment, in the case of a standby device in which the pre-power amplifier is not provided in the first standby transceiving link, when there is jitter in the first main phase history and there is no jitter in the first standby phase history, it is determined that there is a failure in the main device of the pre-power amplifier.

And under the condition that the host of the pre-power amplifier is not arranged in the first main transceiving link, when the first standby phase history has jitter and the first main phase history has no jitter, determining that the standby machine of the pre-power amplifier has a fault.

In an embodiment, in a case that the standby machine of the microwave combination is not disposed in the first standby transceiving link, when there is jitter in the first main phase history and there is no jitter in the first standby phase history, it is determined that there is a fault in the main machine of the microwave combination.

And under the condition that the host of the microwave combination is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the microwave combination has a fault.

In an embodiment, in the case that there is no spare machine of the radar receiver in the first spare transceiving link, when there is jitter in the first main phase history and there is no jitter in the first spare phase history, it is determined that there is a fault in a host machine of the radar receiver.

And under the condition that the main machine of the radar receiver is not arranged in the first main transceiving link, when the first standby phase process has jitter and the first main phase process has no jitter, determining that the standby machine of the radar receiver has a fault.

In practical application, the frequency modulation signal source is used as a generation device of a linear frequency modulation signal, and a fault condition also exists; before the pre-power amplifier, the microwave combination and the radar receiver are positioned to be a single fault machine, the fault of the frequency modulation signal source is eliminated firstly, and the pre-power amplifier, the microwave combination and the radar receiver can be continuously judged to be the single fault machine under the condition that the frequency modulation signal source is determined to be fault-free; and if the frequency modulation signal source is determined to have a fault, the single frequency modulation signal source is maintained firstly, and after the fault of the frequency modulation signal source is determined to be recovered, the fault problems of the pre-power amplifier, the microwave combination and the radar receiver are continuously checked.

Based on this, in an embodiment, before obtaining a first main phase history corresponding to a first main transceiving link of a first transceiving link and a first standby phase history corresponding to a first standby transceiving link of the first transceiving link, as shown in fig. 5, the method further includes:

step 501: acquiring a second main phase process corresponding to a second main transceiving link of a second transceiving link and a second standby phase process corresponding to a second standby transceiving link of the second transceiving link;

here, the second transceiving link is formed by connecting the fm signal source, the adjustable attenuator, and the data former.

Step 502: and judging whether the second main phase process and the second auxiliary phase process have phase jitter or not to obtain a second judgment result.

Step 503: and when the second judgment result represents that the second main phase process and the second standby phase process have no phase jitter, determining that the single machine fault does not exist in the frequency modulation signal source.

In an embodiment, the method further comprises:

when the second judgment result represents that phase jitter exists in the second main phase process, the frequency modulation signal source is determined to be a single fault machine, and a host of the frequency modulation signal source has a fault; alternatively, the first and second electrodes may be,

and when the second judgment result represents that the second standby phase process has phase jitter, determining that the frequency modulation signal source is a single fault machine and the standby machine of the frequency modulation signal source has a fault.

The present invention will be described in further detail with reference to the following application examples.

In the satellite-borne SAR transceiving link phase jitter problem positioning method of the application embodiment, whether a frequency modulation signal source is a single fault machine is checked, and whether a pre-power amplifier, a microwave combination and a radar receiver are single fault machines is checked respectively; the method specifically comprises the following steps:

step 1: and judging whether the frequency modulation signal source is a single fault machine.

Specifically, as shown in fig. 6, a frequency modulation signal source, an adjustable attenuator, and a data former are connected to form a transceiving link, so that a main linear frequency modulation signal and a standby linear frequency modulation signal output by a host and a standby of the frequency modulation signal source are output to the data former through an adjustable attenuator a and an adjustable attenuator B; the adjustable attenuator A and the adjustable attenuator B are used for attenuating the power of the main linear frequency modulation signal and the power of the standby linear frequency modulation signal, so that the signal output to the data former meets the power requirement of the input signal of the data former; the data former converts the input microwave signal into digital signal, and performs digital pulse compression processing on the digital signal to further obtain main phase history and standby phase history.

Here, if the primary phase history and the secondary phase history are both stable (i.e., there is no jitter), it may be determined that the fm signal source is not faulty; if jitter exists in a certain phase process (namely the phase stability index is more than 0.5 ℃), the frequency modulation signal source can be determined to be a fault single machine. If the main phase process has jitter, the host of the frequency modulation signal source can be determined to have a fault; if the standby phase history has jitter, the standby machine of the frequency modulation signal source can be determined to have a fault.

Step 2: and judging whether the main machine of the pre-power amplifier has a fault or not.

Specifically, as shown in fig. 7, a frequency modulation signal source, a pre-power amplifier, an adjustable attenuator, a microwave combination, a radar receiver and a data former are connected to form a transceiving link, wherein only a main machine of the pre-power amplifier is connected to a main transceiving link, and a standby machine of the pre-power amplifier is not connected to a standby transceiving link. The main linear frequency modulation signal output by a main machine of a frequency modulation signal source is output to an adjustable attenuator A through a main machine of a pre-power amplifier, a standby linear frequency modulation signal output by a standby machine of the frequency modulation signal source is directly output to an adjustable attenuator B, the power of the input signal is attenuated by the adjustable attenuator A and the adjustable attenuator B and output to a microwave combination, the signal output to the microwave combination meets the power requirement of a microwave combination input signal, the microwave combination outputs the signal to a data former through a radar receiver, the microwave signal is converted into a digital signal by the data former, and digital pulse compression processing is carried out on the digital signal to obtain a main phase history and a standby phase history. Comparing the main phase history with the standby phase history, if the main phase history has phase jitter (i.e. the phase stability is greater than 0.5 °) and the standby phase history has phase stability, it can be determined that the main machine of the pre-power amplifier has a fault.

And step 3: and judging whether the standby machine of the pre-power amplifier has a fault or not.

Specifically, in a manner similar to the manner of determining whether the main machine of the pre-power amplifier has a fault in step 2, the connection states of the main machine and the standby machine of the pre-power amplifier are interchanged, that is, only the standby machine of the pre-power amplifier is connected to the standby transceiving link, while the main machine of the pre-power amplifier is not connected to the main transceiving link, and by comparing the main phase history with the standby phase history, when there is no phase jitter in the main phase history and there is phase jitter in the standby phase history, it is determined that the standby machine of the pre-power amplifier has a fault.

And 4, step 4: and respectively judging whether the main machine and the standby machine of the microwave combination and the main machine and the standby machine of the radar receiver have faults.

Specifically, the judgment is made in a similar manner to steps 2 and 3.

When judging whether the main machine of the microwave combination has a fault, only connecting the main machine of the microwave combination to a main transceiving link, and not connecting the standby transceiving link to the standby machine of the microwave combination, and determining whether the main machine of the microwave combination has a fault by comparing a main phase process with a standby phase process; when judging whether the standby machine of the microwave combination has a fault, only connecting the standby machine of the microwave combination to the standby transceiving link, and not connecting the host machine of the microwave combination to the main transceiving link, and determining whether the standby machine of the microwave combination has a fault by comparing the main phase process with the standby phase process.

When judging whether the host of the radar receiver has a fault, only connecting the host of the radar receiver to the main transceiving link, and not connecting the standby transceiving link to the standby machine of the radar receiver, and determining whether the host of the radar receiver has the fault by comparing the main phase process with the standby phase process; when judging whether the standby machine of the radar receiver has a fault, only connecting the standby machine of the radar receiver to the standby transceiving link, and not connecting the host machine of the radar receiver to the main transceiving link, and determining whether the standby machine of the radar receiver has the fault by comparing the main phase process with the standby phase process.

The technical solution of the application embodiment is further described in detail with reference to the flow chart.

As shown in fig. 8, the problem of locating a stand-alone device in a transceiving link specifically includes the following steps:

step 801: configuring a host machine of a single machine A in the transceiving link to be connected with a main transceiving link, and a standby machine of the single machine A is not connected with a standby transceiving link; determining a main phase process of a main transceiving link and a standby phase process of a standby transceiving link; then step 802 is executed;

here, the individual a may be any one of the individuals connected in the transceiving link.

Step 802: judging whether the main phase process and the standby phase process represent the phase instability of a main transceiving link, but the phase stability of a standby transceiving link; if yes, determining that the host of the single machine A fails; if not, go to step 803.

Step 803: configuring a standby machine of the single machine A in the transceiving link to be connected with a standby transceiving link, and a host machine of the single machine A is not connected with a main transceiving link; the main phase history of the main transceiving link and the standby phase history of the standby transceiving link are determined, and then step 804 is executed.

Step 804: judging whether the main phase process and the standby phase process represent that the phases of the standby transceiving links are unstable, but the phases of the main transceiving links are stable; if yes, determining that the standby machine of the single machine A breaks down; if not, go to step 805.

Step 805: and determining that the single machine A has no fault.

In the process of positioning the single-computer equipment problem in the transceiving link, whether a host of the single computer A has a fault or not can be judged first, and then whether a standby computer of the single computer A has a fault or not can be judged; of course, in practical application, it is also possible to determine whether the standby of the single computer a has a fault first, and then determine whether the host of the single computer a has a fault.

As shown in fig. 9, locating a problem in a transceiving link may further include the following steps:

step 901: configuring a transceiving link formed by connecting a frequency modulation signal source, an adjustable attenuator and a data former; the main phase history of the main transceiving link and the standby phase history of the standby transceiving link are determined, and then step 902 is executed.

Step 902: judging whether the main phase process and the standby phase process represent the phase instability of a main transceiving link, but the phase stability of a standby transceiving link; or, judging whether the main phase process and the standby phase process represent the phase instability of the standby transceiving link, but the phase of the main transceiving link is stable; if so, determining that the host or the standby of the frequency modulation signal source has a fault; if not, go to step 903.

Step 903: a transmit receive chain consisting of a fm signal source, a pre-power amplifier, an adjustable attenuator, a microwave combiner, a radar receiver, and a data former connection is configured, followed by step 904.

Step 904: configuring a host machine provided with a pre-power amplifier in a main transceiving link, but configuring a standby machine not provided with the pre-power amplifier in a standby transceiving link; or, the standby transceiver link is provided with a standby machine of the pre-power amplifier, but the main transceiver link is not provided with a main machine of the pre-power amplifier. The main phase history of the main transceiving link and the standby phase history of the standby transceiving link are determined, and then step 905 is performed.

Step 905: judging whether the main phase process and the standby phase process represent the phase instability of a main transceiving link, but the phase stability of a standby transceiving link; or, judging whether the main phase process and the standby phase process represent the phase instability of the standby transceiving link, but the phase of the main transceiving link is stable; if yes, determining that the main machine or the standby machine of the pre-power amplifier has a fault; if not, go to step 906.

Step 906: a host machine provided with a microwave combination in a main transceiving link is configured, but a standby machine provided with no microwave combination in a standby transceiving link is configured; or, the standby transceiver link is provided with a standby machine of the microwave combination, but the main transceiver link is not provided with a main machine of the microwave combination. The main phase history of the main transceiving link and the standby phase history of the standby transceiving link are determined, and then step 907 is executed.

Step 907: judging whether the main phase process and the standby phase process represent the phase instability of a main transceiving link, but the phase stability of a standby transceiving link; or, judging whether the main phase process and the standby phase process represent the phase instability of the standby transceiving link, but the phase of the main transceiving link is stable; if so, determining that the main machine or the standby machine of the microwave combination has a fault; if not, go to step 908.

Step 908: configuring a host machine provided with a radar receiver in a main transceiving link, but not a standby machine provided with the radar receiver in a standby transceiving link; or the standby transceiver link is provided with a standby machine of the radar receiver, but the main transceiver link is not provided with a main machine of the radar receiver. The main phase history of the main transceiving link and the standby phase history of the standby transceiving link are determined, and then step 909 is executed.

Step 909: judging whether the main phase process and the standby phase process represent the phase instability of a main transceiving link, but the phase stability of a standby transceiving link; or, judging whether the main phase process and the standby phase process represent the phase instability of the standby transceiving link, but the phase of the main transceiving link is stable; if yes, determining that the host or the standby of the radar receiver has a fault; if not, go to step 910.

Step 910: and determining that the frequency modulation signal source, the pre-power amplifier, the microwave combination and the radar receiver have no fault.

In practical application, for problem location in the receiving and transmitting link, whether the main machine or the standby machine of the pre-power amplifier, the microwave combination and the radar receiver has faults or not can be judged according to any sequence.

The scheme provided by the application embodiment has the following advantages:

firstly, the fault location of the phase jitter problem of the transceiving link of the satellite-borne SAR system is solved.

Secondly, if a single machine in the transceiving link is determined to have a fault, the single machine can be maintained in time to remove the fault, and time is saved for rapidly positioning the fault of the single machine.

Thirdly, the operation method is simple and easy to implement, can be applied to the positioning of the phase problem of the single-base, double-base and multi-base satellite-borne SAR systems, or can be applied to the radar system which outputs the non-linear frequency modulation signal by the frequency modulation signal source, and has wide application range.

It should be noted that: the terms "first," "second," and the like in the embodiments of the present invention are used for distinguishing similar objects, and do not necessarily have to be used for describing a particular order or sequence.

In addition, the technical solutions described in the embodiments of the present invention may be arbitrarily combined without conflict.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.