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Cluster target detection method

A technology of target detection and clustering, which is applied in the field of energy accumulation and target detection, and the estimation of cluster target echo scattering center in noise, which can solve the problems of detection performance loss and actual detection performance that cannot be achieved.

Active Publication Date: 2022-03-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Due to the sparseness of the actual distance-extended target scattering center distribution, directly using all the echo scattering centers in the range window will cause a loss of detection performance, and the actual detection performance cannot reach the claimed performance

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Embodiment Construction

[0039] The present invention mainly adopts the method of computer simulation for verification, and all steps and conclusions are verified correctly on MATLAB-R2018a. The present invention will be described in further detail below with reference to the accompanying drawings.

[0040] Aiming at the shortcomings of the background technology, a cluster target detection method is researched and designed, which overcomes the fact that the existing detection methods can only achieve energy accumulation of point targets and range-extended targets, inaccurate estimation of the scattering centers of range-extended targets, and inability to achieve distance-multiple targets. The problem of clustered target energy accumulation and detection for the Puller 2D extension.

[0041] The specific process is as figure 1 As shown, the relevant parameters are initialized first, specifically: initializing the system parameters of the detector, including parameters k, η, μ, ε and MinPts. Among the...

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Abstract

The invention discloses a cluster target detection method, which is based on amplitude characteristics of a cluster target scattering center in a distance-Doppler domain of radar echoes and position distribution characteristics of scattering centers in two adjacent frames of echoes, and adopts a mode of cascading fixed threshold filtering and position cross filtering. The number and distribution of strong scattering centers of each cluster target are effectively estimated, and finally, non-coherent accumulation is performed on the energy of the strong scattering centers of each cluster target to realize detection, so that the problems of inaccurate estimation of the target scattering centers in noise and cluster target echo energy accumulation of the scattering centers expanded in a distance-Doppler domain are effectively solved. Therefore, the method has a higher detection probability for the cluster target under a constant false alarm rate, and improves the radar detection efficiency.

Description

technical field [0001] The invention belongs to the technical field of radar target detection, and in particular relates to methods for scatter center estimation, energy accumulation and target detection of group target echoes in noise. Background technique [0002] The cluster target is a target cluster composed of a large number of individual targets with similar sizes and similar motion patterns. The spatial relationship (such as position) is relatively fixed within a certain period of time, and the measurement difference between any two nearest adjacent objects is smaller than the correlation of the sensor system. threshold, for the sensor, the collection of these individuals is called a cluster target, such as drone swarms, bird swarms, insect swarms, etc. [0003] The cluster target has the characteristics of small individual, large overall scale, and flexible time-varying spatial distribution. In addition to the overall movement speed, each individual in the cluster w...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G06K9/00G06K9/62
CPCG01S7/411G06F2218/04G06F2218/12G06F18/23213Y02A90/10
Inventor 任周唱易伟梅刚黄宇轩杨东旭孔令讲王超
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA