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Range-spread target detection method based on multichannel sequence statistics

A technology of distance expansion target and sequential statistics, which is applied in the field of distance expansion target detection based on multi-channel sequential statistics, can solve the problem of unknown prior information such as the number and location of strong scattering centers, and achieves reduced computational complexity and better detection effect. Effect

Inactive Publication Date: 2015-04-08
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a method for detecting distance-extended targets based on multi-channel sequential statistics, to solve the problem of unknown prior information including the number and position of strong scattering centers in the detection process, and improve the detection efficiency. performance

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  • Range-spread target detection method based on multichannel sequence statistics
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  • Range-spread target detection method based on multichannel sequence statistics

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing:

[0025] refer to figure 1 , is a flow chart of a distance-extended target detection method based on multi-channel sequential statistics of the present invention. The multi-channel sequential statistics-based distance extended target detection method includes the following steps:

[0026] Step 1, use the radar to send and receive signals, and use the radar to receive echo signals; the echo signals received by the radar include target echo signals and clutter signals, and the echo signals received by the radar contain N pulses; use the M+1th distance unit To the L+M distance unit to form a detection window, L represents the length of the detection window, and M is a set natural number; the accumulated value y of the modulus value of the echo signal vector of the lth distance unit in the detection window is obtained l,N , l takes 1 to L, z l (n) represents the data receive...

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Abstract

The invention belongs to the technical field of target detection, and especially relates to a range-spread target detection method based on multichannel sequence statistics under the system of a broadband radar. The method comprises the following steps: (an echo signal received by a radar) comprising N pulses; employing range units from an (M+1)-th one to an (L+M)-th to form a detection window, wherein L represents the length of the detection window, and M represents a set natural number; obtaining accumulation values y1 and N of modulus of echo signal vectors of the first range unit in the detection window; arranging the accumulation values y1 and N of modulus of echo signal vectors of each range unit in the detection window in a descending order; enabling a first value located at the first order after arrangement to be represented by y(1, N); setting a terminate decision length K and Q detection channels; obtaining a detection statistical magnitude of each detection channel; determining a detection threshold value of each detection channel; determining that a target exists if the detection statistical magnitude of each detection channel is greater than or equal to the threshold value of the corresponding detection channel; or else, determining that the target does not exist.

Description

technical field [0001] The invention belongs to the technical field of target detection, and in particular relates to a range-extending target detection method based on multi-channel sequential statistics under a broadband radar system. Background technique [0002] The bandwidth of the radar transmission waveform determines its distance resolution capability. Due to the wide bandwidth of the waveform transmitted by the broadband radar, it has a strong distance resolution capability. The range unit size that wideband radar can distinguish is smaller than the size of the target, so it can distinguish a target into multiple independent scattering points. The number of target scattering points is related to the expansion size of the target in the radial distance of the radar and the distance resolution capability of the radar. Usually, the intensity of different scattering points of the target is different, and a target only contains several strong scattering points. Since th...

Claims

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Application Information

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IPC IPC(8): G01S13/04
CPCG01S13/04
Inventor 许述文杜兰刘旭水鹏朗刘峥
Owner XIDIAN UNIV
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