A timing control device and method for improving the utilization rate of radar radiation echo

Abstract

This application belongs to the field of radar timing control, and particularly relates to a timing control device and method for improving the utilization rate of radar radiation echo. The device includes: The data acquisition and packaging module includes an ADC unit and a first FPGA unit. The ADC unit is used for collecting radar echo signals, and the first FPGA unit is used for packaging the data collected by the ADC unit and sending the data to the data processing module according to the control instructions issued by the control module. The control module includes a second FPGA unit, which is used for issuing control instructions to the data acquisition and packaging module and the data processing module respectively according to the control instructions issued by the avionics system, and resetting the data acquisition and packaging module and the data processing module. The data processing module includes a third FPGA unit and a DSP unit. The third FPGA unit is used for receiving and preprocessing data, and the DSP unit is used for processing data and sending the processed data to the control module according to the control instructions issued by the control module.

Description

Technical Field

[0001] This application belongs to the field of radar timing control, and particularly relates to a timing control device and method for improving the utilization rate of radar radiation echo. Background Art

[0002] In modern warfare, the demand for radar performance is getting higher and higher. Radar systems with large sampling, large bandwidth, and high resolution have become a trend. However, for these high-performance radar indicators, the primary issues to be addressed are data acquisition and packaging, as well as subsequent usage.

[0003] The existing data packaging technology uses a weak timing packaging method, which is driven by the data stream. However, due to the inability of each working module to cooperate, when switching states, it is easy to cause the timing of each working module to be disordered, resulting in the radar not being able to work properly. Due to time limitations, the data acquisition and packaging module cannot simultaneously complete the tasks of data acquisition, packaging, and transmission. Therefore, the existing data acquisition and packaging logic is to collect echo data at the current PRF and send the packaged data at the next PRF, wasting one PRF signal per frame. To ensure that there is no timing disorder problem when the radar switches states, the timing control method is as Figure 1 shown. The last PRF only packages and sends the data of the previous PRF, resulting in the loss of the echo data of the last PRF in each frame, reducing the data utilization efficiency, being unfavorable for the lean processing of the radar, and being a technical constraint for the development of a radar system with a high resolution for long detection distances.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate at least one of the above-mentioned defects of the existing technology. Summary of the Invention

[0005] The purpose of this application is to provide a timing control device and method for improving the utilization rate of radar radiation echo, so as to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is as follows:

[0007] The first aspect of this application provides a timing control device for improving the utilization rate of radar radiation echo, including:

[0008] A data acquisition and packaging module, including an ADC unit and a first FPGA unit. The ADC unit is used for collecting radar echo signals, and the first FPGA unit is used for packaging the data collected by the ADC unit and sending the data to the data processing module according to the control instructions issued by the control module;

[0009] The control module includes a second FPGA unit, which is used to issue control instructions to the data acquisition and packaging module and the data processing module respectively according to the control instructions issued by the avionics system, and reset the data acquisition and packaging module and the data processing module to ensure the normal operation of the radar;

[0010] The data processing module includes a third FPGA unit and a DSP unit. The third FPGA unit is used for data reception and preprocessing, and the DSP unit is used for data processing and sends the processed data to the control module according to the control instructions issued by the control module;

[0011] Wherein, the data acquisition and packaging module and the data processing module are also used to switch the working mode according to the control instructions issued by the control module.

[0012] In at least one embodiment of the present application, the preprocessing method of the third FPGA unit for data includes outlier rejection.

[0013] In at least one embodiment of the present application, the processing method of the DSP unit for data includes pulse compression, CFAR detection, and beam combining.

[0014] In at least one embodiment of the present application, the working mode includes sea mode, anti-submarine search mode, air mode, meteorological mode, and SAR mode.

[0015] The second aspect of the present application provides a timing control method for improving the utilization rate of radar radiation echoes. Based on the timing control device for improving the utilization rate of radar radiation echoes as described above, it includes:

[0016] When the radar state remains unchanged:

[0017] The data acquisition and packaging module first receives the radar echo signal;

[0018] In the first PRF period of the first frame period, the ADC unit completes the acquisition of the first packet of data, and the first FPGA unit completes the packaging of the first packet of data;

[0019] In the second PRF period of the first frame period, the ADC unit completes the acquisition of the second packet of data, and the first FPGA unit sends the packaged first packet of data to the data processing module;

[0020] And so on. In the nth PRF period of the first frame period, the ADC unit completes the acquisition of the nth packet of data, and the first FPGA unit sends the packaged (n - 1)th packet of data to the data processing module;

[0021] During the first PRF cycle of the second frame period, the ADC unit completes the acquisition of the first packet of data, and the first FPGA unit completes the packing of the nth packet of data in the first frame period and the first packet of data in the second frame period;

[0022] During the second PRF cycle of the second frame period, the ADC unit completes the acquisition of the second packet of data, and the first FPGA unit sends the packed nth packet of data in the first frame period and the first packet of data in the second frame period to the data processing module;

[0023] And so on. During the nth PRF cycle of the second frame period, the ADC unit completes the acquisition of the nth packet of data, and the first FPGA unit sends the packed (n - 1)th packet of data to the data processing module;

[0024] And so on until the acquisition and packing of the data are completed;

[0025] When the radar working state switches:

[0026] The control module sends control instructions to the data acquisition and packing module and the data processing module respectively to control the two modules to switch the working mode;

[0027] The control module sends two reset frames to the data acquisition and packing module and the data processing module respectively. Among them,

[0028] When the control module sends reset frame 1 to the data acquisition and packing module and the data processing module respectively, the data acquisition and packing module sends the packed nth packet of data in the previous frame period to the data processing module, and resets the data acquisition and packing module, but does not pack the first packet of data of reset frame 1 and the data of the subsequent reset frames. The data processing module does not respond to reset frame 1 and only processes and outputs the data sent by the current data acquisition and packing module;

[0029] When the control module sends reset frame 2 to the data acquisition and packing module and the data processing module respectively, the data acquisition and packing module does not respond to reset frame 2, and the data acquisition and packing module packs according to the packing timing of reset frame 2. After receiving reset frame 2, the data processing module resets the data processing module and performs subsequent processing at normal frame 1.

[0030] The invention has at least the following beneficial technical effects:

[0031] The timing control device for improving the radar radiation echo utilization rate of the present application can solve the problem of loss of the last PRF data of each frame of data in the existing data timing control method, and is of great significance for improving the long-distance detection and high-resolution performance indexes of the radar. Description of the Drawings

[0032] Figure 1It is a flowchart of the radar data timing control method in the prior art;

[0033] Figure 2 It is a schematic diagram of the timing control device for improving the utilization rate of radar radiation echo in an embodiment of the present application;

[0034] Figure 3 It is a flowchart of the timing control method for improving the utilization rate of radar radiation echo when the radar state remains unchanged in an embodiment of the present application;

[0035] Figure 4 It is a flowchart of the timing control method for improving the utilization rate of radar radiation echo when the radar working state switches in an embodiment of the present application. Detailed implementation manners

[0036] To make the purpose, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some but not all of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application and should not be construed as a limitation to the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the protection scope of the present application.

[0038] The following combines the attached Figures 2 to 4 A further detailed description of the present application will be given below.

[0039] The first aspect of the present application provides a timing control device for improving the utilization rate of radar radiation echo, including: a data acquisition and packaging module, a control module, and a data processing module.

[0040] Specifically, as Figure 2As shown in the figure, the data acquisition and packaging module includes an ADC unit and a first FPGA unit. The ADC unit is used for collecting radar echo signals, and the first FPGA unit is used for packaging the data collected by the ADC unit and sending the data to the data processing module according to the control instructions issued by the control module. The control module includes a second FPGA unit, which is used for issuing control instructions to the data acquisition and packaging module and the data processing module respectively according to the control instructions issued by the avionics system, and resetting the data acquisition and packaging module and the data processing module to ensure the normal operation of the radar. The data processing module includes a third FPGA unit and a DSP unit. The third FPGA unit is used for receiving and preprocessing data, and the DSP unit is used for processing data to meet the performance requirements of each mode of the radar, and sending the processed data to the control module according to the control instructions issued by the control module. In addition, the data acquisition and packaging module and the data processing module are also used for switching the working mode according to the control instructions issued by the control module.

[0041] In the preferred implementation of this application, the preprocessing method of the data by the third FPGA unit of the data processing module includes outlier rejection and the like. The processing method of the data by the DSP unit of the data processing module includes pulse compression, CFAR detection, beam combination and the like. The working modes include sea mode, anti-submarine search mode, air mode, meteorological mode, SAR mode and the like.

[0042] The second aspect of this application provides a timing control method for improving the utilization rate of radar radiation echoes. Based on the above timing control device for improving the utilization rate of radar radiation echoes, when the radar is working in a certain mode, the data acquisition and packaging module performs data acquisition and packaging according to Figure 3 the timing control strategy to ensure that no data is lost during the operation of the radar; when the radar switches states, the control module performs a reset operation on each module, and the data acquisition and packaging module performs a reset on the module according to Figure 4 the timing control strategy, and at the same time, the data processing module also performs a reset operation, so as to ensure that the radar can work normally when switching states.

[0043] Specifically, as Figures 3 - 4 shown, the timing control method for improving the utilization rate of radar radiation echoes in this application includes:

[0044] When the radar state remains unchanged:

[0045] The data acquisition and packaging module first receives radar echo signals;

[0046] Within the first PRF period of the first frame period, the ADC unit completes the acquisition of the first packet of data, and the first FPGA unit completes the packaging of the first packet of data;

[0047] During the second PRF cycle of the first frame period, the ADC unit completes the acquisition of the second packet of data, and the first FPGA unit sends the packed first packet of data to the data processing module;

[0048] And so on. During the nth PRF cycle of the first frame period, the ADC unit completes the acquisition of the nth packet of data, and the first FPGA unit sends the packed (n - 1)th packet of data to the data processing module;

[0049] During the first PRF cycle of the second frame period, the ADC unit completes the acquisition of the first packet of data, and the first FPGA unit completes the packing of the nth packet of data in the first frame period and the first packet of data in the second frame period;

[0050] During the second PRF cycle of the second frame period, the ADC unit completes the acquisition of the second packet of data, and the first FPGA unit sends the packed nth packet of data in the first frame period and the first packet of data in the second frame period to the data processing module;

[0051] And so on. During the nth PRF cycle of the second frame period, the ADC unit completes the acquisition of the nth packet of data, and the first FPGA unit sends the packed (n - 1)th packet of data to the data processing module;

[0052] And so on until the acquisition and packing of the data are completed.

[0053] When the radar working state changes, the radar control module sends control instructions to the data acquisition and packing module and the data processing module respectively, controlling the two modules to switch the working mode and complete the reset of the internal programs of the modules to ensure the normal functions of each module. Specifically:

[0054] When the radar working state changes:

[0055] The control module sends control instructions to the data acquisition and packing module and the data processing module respectively to control the two modules to switch the working mode;

[0056] The control module sends two reset frames to the data acquisition and packing module and the data processing module respectively. Among them,

[0057] When the control module sends reset frame 1 to the data acquisition and packing module and the data processing module respectively, the data acquisition and packing module sends the packed nth packet of data in the previous frame period to the data processing module and resets the data acquisition and packing module, but does not pack the first packet of data in reset frame 1 and the data in the subsequent reset frames. The data processing module does not respond to reset frame 1 and only processes and outputs the data sent by the current data acquisition and packing module;

[0058] When the control module sends the reset frame 2 to the data acquisition and packaging module and the data processing module respectively, the data acquisition and packaging module does not respond to the reset frame 2. The data acquisition and packaging module performs packaging according to the packaging timing of the reset frame 2. After receiving the reset frame 2, the data processing module resets itself and performs subsequent processing when the normal frame 1 arrives.

[0059] The timing control method for improving the utilization rate of radar radiation echo in this application. Through two reset operations, the entire device resets the data acquisition and packaging module and the data processing module, ensuring the normal operation of the radar when switching states. After completing the state transition, the data acquisition and packaging timing still follows Figure 3 the timing.

[0060] The timing control device and method for improving the utilization rate of radar radiation echo in this application can ensure that the collected radar data is not lost, each module works properly, improve the utilization rate of radar data, realize the refined processing of the radar, and thus improve the working performance of the radar.

[0061] The timing control device and method for improving the utilization rate of radar radiation echo in this application can improve the working efficiency of the radar. When switching the working state of the radar, the control module coordinates the work of each working module to ensure the timing matching between the working modules, which can effectively improve the working efficiency of each module, and thus improve the working efficiency of the radar; it can improve the utilization rate of radar data. Compared with the prior art, it does not need to lose the last PRF data of each frame, solves the problem of PRF waste, realizes the refined processing of the radar, improves the working performance of the radar, and can increase the data utilization rate of the radar by up to 11.1% according to different radar working modes; it has strong portability. This application does not need to change the hardware and software architecture of the radar and is easy to promote on radars using these three working modules.

[0062] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claimed rights.

Claims

1. A timing control device for improving the utilization rate of radar radiation echo, characterized in that Including: A data acquisition and packaging module, including an ADC unit and a first FPGA unit. The ADC unit is used for collecting radar echo signals, and the first FPGA unit is used for packaging the data collected by the ADC unit and sending the data to the data processing module according to the control instructions issued by the control module; A control module, including a second FPGA unit. The second FPGA unit is used for issuing control instructions to the data acquisition and packaging module and the data processing module respectively according to the control instructions issued by the avionics system, and resetting the data acquisition and packaging module and the data processing module to ensure the normal operation of the radar; A data processing module, including a third FPGA unit and a DSP unit. The third FPGA unit is used for receiving and preprocessing data, and the DSP unit is used for processing data and sending the processed data to the control module according to the control instructions issued by the control module; Wherein, the data acquisition and packaging module and the data processing module are also used for switching the working mode according to the control instructions issued by the control module; A timing control method for improving the utilization rate of radar radiation echo includes: When the radar state remains unchanged: The data acquisition and packaging module first receives radar echo signals; In the first PRF cycle of the first frame period, the ADC unit completes the acquisition of the first packet of data, and the first FPGA unit completes the packaging of the first packet of data; In the second PRF cycle of the first frame period, the ADC unit completes the acquisition of the second packet of data, and the first FPGA unit sends the packaged first packet of data to the data processing module; And so on. In the nth PRF cycle of the first frame period, the ADC unit completes the acquisition of the nth packet of data, and the first FPGA unit sends the packaged (n - 1)th packet of data to the data processing module; In the first PRF cycle of the second frame period, the ADC unit completes the acquisition of the first packet of data, and the first FPGA unit completes the packaging of the nth packet of data in the first frame period and the first packet of data in the second frame period; In the second PRF cycle of the second frame period, the ADC unit completes the acquisition of the second packet of data, and the first FPGA unit sends the packaged nth packet of data in the first frame period and the first packet of data in the second frame period to the data processing module; And so on. In the nth PRF cycle of the second frame period, the ADC unit completes the acquisition of the nth packet of data, and the first FPGA unit sends the packaged (n - 1)th packet of data to the data processing module; And so on until the acquisition and packaging of data are completed; When the radar working state switches: The control module sends control instructions to the data acquisition and packaging module and the data processing module respectively to control the two modules to switch the working mode; The control module sends two reset frames to the data acquisition and packaging module and the data processing module respectively, wherein, When the control module sends the reset frame 1 to the data acquisition and packaging module and the data processing module respectively, the data acquisition and packaging module sends the nth packet of data in the previous frame cycle that has been packaged to the data processing module, and resets the data acquisition and packaging module, but does not package the first packet of the reset frame 1 and the data of the subsequent reset frames. The data processing module does not respond to the reset frame 1 and only processes and outputs the data sent by the current data acquisition and packaging module. When the control module sends the reset frame 2 to the data acquisition and packaging module and the data processing module respectively, the data acquisition and packaging module does not respond to the reset frame 2. The data acquisition and packaging module packages according to the packaging timing of the reset frame 2. After receiving the reset frame 2, the data processing module resets the data processing module and performs subsequent processing at the normal frame 1.

2. The timing control device for improving the utilization rate of radar radiation echo according to claim 1, wherein, The preprocessing method of the data by the third FPGA unit includes outlier rejection.

3. The timing control device for improving the utilization rate of radar radiation echo according to claim 2, characterized in that, The processing method of the data by the DSP unit includes pulse compression, CFAR detection, and beam combining.

4. The timing control device for improving the utilization rate of radar radiation echo according to claim 3, characterized in that, The working modes include the sea mode, the submarine search mode, the air mode, the meteorological mode, and the SAR mode.

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