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Parallel convolution method and device applied to radar signal processing

A technology of radar signal processing and convolution method, which is applied in radio wave measurement systems, complex mathematical operations, instruments, etc., can solve problems such as long convolution processing delay, failure to meet design requirements, and inability to complete long convolution, etc., to achieve The effect of shortening the processing time and increasing the operating speed

Active Publication Date: 2022-03-15
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

When traditional convolution is performed, the input signal x(n) and the system function h(n) must have a certain length, and arbitrary long convolution cannot be completed.
In addition, the traditional convolution process has a long delay (for example, when performing the convolution operation of 4096 points and 8192 points, only the clock cycle required for FFT transformation is 32918 clock cycles
The time required under the 200MHZ clock is 164.59us), which cannot meet the design requirements

Method used

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  • Parallel convolution method and device applied to radar signal processing
  • Parallel convolution method and device applied to radar signal processing
  • Parallel convolution method and device applied to radar signal processing

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specific Embodiment

[0083] The following is an implementation principle of the present method with an arbitrary long input signal (radar signal) in each stage (4 1024 points signals) and 8 segments (8 1024 point functions).

[0084] The input signal x (n) is a sine wave of 50 MHz, a magnitude of 2 ^ 15, and transmits an input signal of 4096 points per 30 ruin. System function h (n) (target response function) is 8192 points of data.

[0085] Step 1: Segment storage section

[0086] The operation first performed after receiving the data is the segmentation storage, which describes the functionality and detailed designs of segmentation storage.

[0087] The functionality implemented is a segmentation store for input signals and system functions. The input signal is divided into 4 segments and stored, and the system function is divided into 8 or stored. The two parts are the same, and there is only the difference in segmentation segment. The input signal is analyzed as an example, and it can be refined i...

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Abstract

The invention discloses a parallel convolution method and device applied to radar signal processing. The method comprises the following steps: carrying out segmented storage on input signals with any length and system functions; the input signal is a radar excitation signal, and the system function is a target response function of the radar excitation signal; respectively carrying out fast Fourier transform on the input signal and the system function after segmented storage; performing complex multiplication and inverse fast Fourier transform on the input signal and the system function after the fast Fourier transform to obtain a multi-section convolution result; and sequentially superposing the multiple sections of convolution structures according to a set rule and a time sequence to obtain a final convolution result. According to the method, a series of operations such as segmentation, storage, FFT (Fast Fourier Transform), complex multiplication, IFFT (Inverse Fast Fourier Transform) and overlapping and adding are carried out on an input signal and a system function by adopting a multi-pipeline parallel processing mode, so that the convolution operation is realized, the processing time is shortened, and the running speed is improved.

Description

Technical field [0001] The present invention relates to the field of radar signal processing, and more particularly to a parallel convolution method and apparatus for use in radar signal processing. Background technique [0002] In signal processing applications, convolution is very common and important, such as various signal filters in communication, echo operations in the radar simulator. In high-speed signal processing applications, the convolutional calculation speed directly affects the response time of the signal processing system, which restricts the performance improvement of the system. [0003] The following is a case where the synthetic aperture radar real-time closed loop echo simulator is used. In the real-time generation process of the scene echo signal, once the echo calculation parameter data packet is received, it is necessary to perform one convolution. The number of points of radar excitation signals and system functions is more, and the amount of operation is...

Claims

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Application Information

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IPC IPC(8): G01S7/40G06F17/15
CPCG01S7/4052G06F17/15
Inventor 邢志强付宇
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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