Radar robust space-time adaption processing method based on iterative subspace tracking algorithm

A technology of space-time self-adaptive and tracking algorithm, applied in the field of radar, can solve the problem of data reduction and affect the effect of space-time self-adaptive processing, and achieve the effect of low time complexity and robust space-time self-adaptive process

Active Publication Date: 2015-11-11
XIDIAN UNIV
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Problems solved by technology

These methods all reduce the distance dependence of clutter by removing the space-time mismatched data, but this will reduce the number of training samples, thus affecting the effect of space-time adaptive processing

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  • Radar robust space-time adaption processing method based on iterative subspace tracking algorithm
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  • Radar robust space-time adaption processing method based on iterative subspace tracking algorithm

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Embodiment Construction

[0028] refer to figure 1 , the radar robust space-time adaptive processing method based on iterative subspace tracking algorithm of the present invention comprises the following specific steps:

[0029] Step 1. First, the space-time data matrix X received by the known radar is:

[0030]

[0031] Wherein, x(n, k) is the received data of the nth antenna and the kth pulse, n=1, 2,..., N, N is the number of antennas, k=1, 2,..., K, K is the number of pulses;

[0032] Then, according to the space-time data matrix X received by the radar, the two-dimensional space-time adaptive processing contains the space / slow time information contained in the angle-Doppler domain by the principle of maximum likelihood estimation, that is, the space-time information of P range units is obtained. -time data matrix, wherein, the space-time data matrix X of the pth distance cell p for:

[0033]

[0034] where x p (n, k) is the received data of the p-th distance unit in the received data of...

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Abstract

The invention discloses a radar robust space-time adaption processing method based on an iterative subspace tracking algorithm. The method comprises the following steps of (1) according to a space-time data matrix X received by a known radar, acquiring P space-time data matrixes of a distance unit; (2) according to the space-time data matrix X received by the radar, writing a corresponding space-time adaptive weight matrix W as the following equation: W=uvT, and giving an optimization problem which is used to solve a space weight vector u and a time weight vector v, wherein the optimization problem is defined in the description; (3) using the iterative subspace tracking algorithm to solve and acquire the space weight vector u and the time weight vector v and calculating a robust space-time steering vector s; (4) carrying out Kronecker product on the robust space-time steering vector s and the space-time data matrix X received by the radar so as to obtain a radar space-time data matrix after adaptive space-time processing so that a target signal after the adaptive space-time processing is obtained.

Description

technical field [0001] The invention belongs to the field of radar technology, and relates to a radar robust space-time adaptive processing method based on an iterative subspace tracking algorithm, which is used to process spatial information and slow time information separately in the case of limited samples to reduce non-uniform Distributed clutter effects. Background technique [0002] Space-time adaptive processing (STAP) is a powerful tool for clutter suppression on moving platforms, and it is widely used in airborne radars. The space-time adaptive system whose statistical properties of clutter, interference and noise are known exactly (that is, the covariance matrix of clutter, interference and noise is known) is considered to be the best method for detecting moving targets, and it is also in severe The best way to detect faint moving targets in the presence of varying clutter and interference. In space-time adaptive processing, the covariance matrix of the clutter i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 朱圣棋廖桂生刘飞扬霍恩来许京伟王渊
Owner XIDIAN UNIV
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