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Method for fast realizing signal processing of passive radar based on GPU (Graphics Processing Unit)

An external radiation source radar and signal processing technology, which is applied in the field of external radiation source radar signal processing, can solve the problems of signal-to-noise ratio reduction, energy diffusion, and failure to meet real-time requirements, and achieve the effect of increasing the acceleration ratio and processing speed

Active Publication Date: 2013-09-18
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

When the sampling rate is 9M, the amount of data in 1s is 9M sampling points are 2 18 More than 30 times, still can not meet the real-time requirements
Moreover, the implementation method mentioned in the above article does not perform target migration correction, which leads to energy diffusion, lower signal-to-noise ratio, and lower target detection ability

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  • Method for fast realizing signal processing of passive radar based on GPU (Graphics Processing Unit)
  • Method for fast realizing signal processing of passive radar based on GPU (Graphics Processing Unit)
  • Method for fast realizing signal processing of passive radar based on GPU (Graphics Processing Unit)

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Embodiment Construction

[0038] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0039] The present invention proposes a GPU-based rapid implementation method for external radiation source radar signal processing, which improves the three links of the traditional external radiation source radar signal processing method. details as follows:

[0040] Step 1, direct wave (ie reference signal), clutter suppression link.

[0041] In this step, the block minimum mean square (BLMS) method is used to cancel the echo signal and the reference signal, and generate the echo signal after direct wave and clutter suppression. And in order to achieve better results, three BLMS iterations are performed. For details of the BLMS algorithm, see [Block Implementation of Adaptive Digital Filters, Gregory A. Clark, Sanjit K. Mitra, Sydney R. Rarker].

[0042] The BLMS algorithm processes the data in blocks. In order to use the parallel processing in the G...

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Abstract

The invention discloses a method for fast realizing the signal processing of passive radar based on a GPU (Graphics Processing Unit). The method comprises the following steps of at a link of direct wave and clutter suppression, dividing whole data into N data blocks and dividing the data blocks into L data segments, wherein the number of data points within each data segment is M; splicing the data with the same data segment number, of each data block together in a way that the current segment of the No. N data block is spliced with the next segment of the first data block; enabling M*N threads by the GPU for parallel processing; at a link of coherent accumulation and walk correction, segmenting the data in a way that all the data are divided into n segments; grouping the continuous segments in a way that every DIM segments form one group; splicing the all groups of data together in sequence and storing such data in a continuous address space of a GPU video memory; and finally, carrying out GPU parallel processing on the each group of data. The method for fast realizing the signal processing of the passive radar based on the GPU is more applicable for the GPU parallel processing, and the higher speedup ratio can enable real-time processing demands to be met.

Description

technical field [0001] The invention relates to the field of external radiation source radar signal processing, in particular to a GPU (Graphics Processing Unit, Graphics Processing Unit)-based rapid implementation method for external radiation source radar signal processing. Background technique [0002] External radiation source radar is a passive radar system that does not emit electromagnetic waves itself, but uses radio, television and other signals as radiation sources. It has the advantages of anti-stealth, low-altitude penetration resistance and strong survivability, and is currently a research hotspot at home and abroad. [0003] Target detection based on external radiation source radar includes the following steps: [0004] (1) The echo signal and direct wave are used for BLMS processing to realize direct wave and clutter suppression. [0005] (2) Coherent accumulation and migration correction. [0006] (3) Constant false alarm (CFAR) detection. [0007] Because...

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Application Information

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IPC IPC(8): G01S7/41G01S7/292
Inventor 胡东辉李晓波关欣仲利华丁赤飚
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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