Multichannel signal pulse pressure time division multiplexing device
A time-division multiplexing and multi-channel technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as large logic resources, limited signal processor application, and occupancy
Inactive Publication Date: 2013-12-25
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology
At present, the FPGA parallel processing technology is used in China. Its disadvantage is that it takes up a lot of logic resources and requires six identical pulse compression modules to complete the above multi-channel processing.
Large-capacity FPGAs must be used in chip selection, which limits the application of signal processors in some fields that require structural size and power consumption in missile-borne and space-borne microwave radars.
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[0026] figure 1 It is a schematic diagram of the radar receiving and processing system. The antenna receives the radar echo signal, and the high-frequency head demodulates the high-frequency signal and sends it to the receiver. The six-way signal completes the pulse pressure processing, so that the DSP processing can complete the coherent accumulation and target detection.
[0027] refer to figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 , the present invention adopts time-division multiplexing pulse pressure processing device when processing microwave radar multi-channel signal pulse pressure.
[0028] The present invention includes following modules:
[0029] Such as figure 2 As shown, according to the data stream processing flow, it is divided into four modules, namely: sampling data buffer module 10 , time division multiplexing controller 20 , pulse pressure processing module 30 and pulse pressure data buffer module 40 . All the modules and their submod...
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The invention relates to a multichannel signal pulse pressure time division multiplexing device. Six-path sample data are cached through a sample data cache module after IQ demodulation of path-combining, pitching and orientation channels is finished. A time division multiplexing controller sequentially sends the cached sample data to a pulse pressure processing module according to different time periods, and the pulse pressure processing module performs processing in different pulse pressure modes according to pulse pressure patterns. Finally, data registration is performed, the data are written into a cache, a pulse data cache module stores the data subjected to pulse pressure in a corresponding address space to achieve the multichannel signal pulse pressure time division multiplexing, and the data are used for DSP to read so as to finish phase-coherent accumulation processing. The sample data cache module of the multichannel signal pulse pressure time division multiplexing device adopts a parallel processing mode, so that the data processing handling capacity is improved. The resource occupancy rate is reduced through the time division multiplexing pulse pressure processing. The data subjected to pulse pressure is finally cached, so that the data reading speed of the DSP and the isolation of clock domain crossing are improved.
Description
technical field [0001] The invention relates to a system based on multi-channel signal pulse pressure time-division multiplexing technology in the field of microwave radar, and is especially suitable for the microwave radar tracking target. Background technique [0002] When the microwave radar tracks the target, it needs to process the pulse pressure of the road, pitch and azimuth channels, and each channel contains IQ two-way data. At present, FPGA parallel processing technology is used in China. Its disadvantage is that it takes up a lot of logic resources, and six identical pulse compression modules are needed to complete the above-mentioned multi-channel processing. Large-capacity FPGAs must be used in chip selection, which limits the application of signal processors in some fields that require structural size and power consumption in missile-borne and space-borne microwave radars. Contents of the invention [0003] The purpose of the present invention is to avoid th...
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Inventor 张衡高媛衡燕江利中李雁斌
Owner SHANGHAI RADIO EQUIP RES INST