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A method and device for improving the performance of gray complementary waveform multi-target recognition

A recognition performance, multi-target technology, applied in the field of improving multi-target recognition performance of Gray complementary waveform, can solve problems such as difficulty in target recognition, and achieve the effects of improving Doppler resolution, simple calculation, and reducing energy

Active Publication Date: 2021-10-29
湖南兵器光电科技有限公司
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Problems solved by technology

This makes object recognition in the scene still more difficult

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  • A method and device for improving the performance of gray complementary waveform multi-target recognition
  • A method and device for improving the performance of gray complementary waveform multi-target recognition
  • A method and device for improving the performance of gray complementary waveform multi-target recognition

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specific Embodiment approach

[0062] figure 1 It is the implementation flowchart of Embodiment 1 of the present invention. The specific implementation method comprises the following steps:

[0063] In the first step, the Doppler of all targets in the detection scene is estimated, and the Doppler estimates of all targets are obtained.

[0064] For the specific estimation method, please refer to Chapter 2.3.4 of W.Dang, Signal Design for Active Sensing, Ph.DDissertation, Colorado State University, 2014. It will not be repeated here.

[0065] In the second step, according to the Doppler estimates of all targets, the Gray complementary waveform signals are transmitted in a specific transmission order, and then matched filtering is performed according to the standard matched filtering weight to obtain the blur function image.

[0066] Suppose there are H targets in the detection scene, A h and are the normalized amplitude of the hth target (the normalized amplitude value can be read directly from the ampl...

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Abstract

The present invention provides a method and device for improving the multi-target recognition performance of Gray complementary waveform, which estimates the Doppler estimated value of all targets in the detection scene; and transmits the Gray complementary value in a specific transmission order according to the Doppler estimated value of all targets in the detected scene. waveform signal, and then perform matched filtering according to the standard matched filtering weight to obtain the first fuzzy function image; transmit the Gray complementary waveform signal in the standard transmission order; then perform matched filtering according to the matched filtering weight of the "binomial design method" to obtain the second fuzzy image function image; perform point-by-point threshold processing on the first fuzzy function image and the second fuzzy function image to obtain the processed result; further filter the processed result to obtain the final fuzzy function image. The invention can effectively improve the Doppler resolution of the target in the final blur function image, and significantly reduce the energy of the range side lobe in the final result, so that each target in the scene can be more easily identified.

Description

technical field [0001] The invention belongs to the field of radar signal processing and relates to a method for improving the multi-target recognition performance of Gray complementary waveforms. Background technique [0002] Golay Complementary Waveforms are composed of two binary sequences x(l) and y(l), where the values ​​of x(l) and y(l) are 1 or -1, l=0,1, ..., L-1, L is the length of each binary sequence, and the binary sequence of two such binary sequences forming Gray's complementary waveform is called Gray's complementary pair (the specific Gray's complementary pair generation method can refer to the literature: M. Golay, "Complementary series," IRE Trans. Inform. Theory, vol. 7, no. 2, pp. 82-87, Apr. 1961.). [0003] The time width occupied by each 1 or -1 value in the Gray complementary pair is T c , so the time width of each Golay complementary pair is LT c . For k=-(L-1),...,(L-1), the Gray complementary waveform satisfies the following conditions: [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/411G01S7/418
Inventor 蒋武廖芯王玉肖楠黄俊刘彬
Owner 湖南兵器光电科技有限公司