Real-time processing method for cancellation of direct wave and clutter of external radiation source radar based on graphic processing unit (GPU)

An external radiation source radar and real-time processing technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as loss of direct wave and clutter suppression ability, affect signal coherent accumulation and detection, and cannot meet real-time requirements, etc., to achieve Reduce the number of repeated iterations, improve real-time processing capabilities, and meet the effects of real-time processing requirements
CN103197300AActive Publication Date: 2013-07-10INST OF ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF ELECTRONICS CHINESE ACAD OF SCI
Publication Date
2013-07-10

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Abstract

The invention provides a real-time processing method for cancellation of direct wave and clutter of an external radiation source radar on a graphic processing unit (GPU), a high-efficiency parallel processing process is built, and the real-time processing capacity of an algorithm is improved. The method comprises the steps: (1), conducting parallel processing on signal in a section mode, and sectioning a signal to be processed in T seconds; (2) adopting a BLMS method to conduct cancellation processing on the signal of each section, wherein the signal of each section is parallel processed through the step (1); (3) adopting the GPU to conduct parallel processing on the signal, processed through the step (1), of each section, conducting processing on data in each section through a fast Fourier transform (FFT) algorithm in a multithreading mode, removing an overlapping region on an output result, conducting splicing, at the same time, outputting a filter coefficient of a last block of data, and serving the filter coefficient as an initial weight coefficient of subsequent data processing; and (4) serving an iterative finally-obtained filter coefficient w (n) as an initial filter weight value of data in a next second, namely, iterating the data of a first section for K times, and processing the subsequent data only once.
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Description

technical field

[0001] The invention relates to a GPU-based real-time processing method for external radiation source radar direct wave clutter cancellation, relates to the field of external radiation source radar (PBR) signal processing, and specifically relates to clutter suppression and its real-time signal processing. Background technique

[0002] In the field of external radiation source radar signal processing, since the radiation source is not specially designed according to the processing requirements of the radar, there are strong direct waves and clutter in the radar echo signal. Since the received signal is uncontrollable, and the external radiation sources such as broadcasting and TV look down, the direct wave and clutter are often 60-140dB higher than the signal, and there are still strong side lobes after coherent matching, which will overwhelm the long-distance and low-speed targets, so direct wave and clutter suppression is one of the core technical issues fa...

Claims

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