Target signal robust space-time adaptive processing method based on amplitude and phase constraints

A space-time adaptive, amplitude-phase technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of high side lobe and main lobe waveform distortion, affecting the robustness of robust space-time adaptive processing, etc., to achieve good performance, The effect of good robustness

Active Publication Date: 2015-12-09
XIDIAN UNIV
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Problems solved by technology

However, in practical applications, the mismatch information generated in the robust space-time region is different, such as the Doppler frequency mismatch and the array antenna mismatch are different, which makes the high sidelo...

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  • Target signal robust space-time adaptive processing method based on amplitude and phase constraints
  • Target signal robust space-time adaptive processing method based on amplitude and phase constraints
  • Target signal robust space-time adaptive processing method based on amplitude and phase constraints

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Embodiment Construction

[0023] refer to figure 1 , is a flow chart of a robust space-time adaptive processing method for a target signal based on amplitude-phase constraints, the iterative optimization robust space-time adaptive processing method based on amplitude-phase constraints comprises the following steps:

[0024] Step 1, set the target signal as the radar space-time data matrix X, and set the first space-time adaptive weight matrix of the radar space-time data matrix X Then set the optimization condition equation of the radar space-time data matrix X, and its specific expression is:

[0025] m i n u , v E { | | u ...

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Abstract

The invention discloses a radar target signal robust space-time adaptive processing method based on amplitude and phase constraints. The method comprises steps: target signals are set to be a radar space-time data matrix, a first space-time adaptive weight matrix for the radar space-time data matrix is obtained, and an optimality condition equation is further obtained; then, according to the optimality condition equation, a second space-time adaptive weight matrix for the radar space-time data matrix is calculated, and an amplitude and phase constraint-based linear constrained minimum variance beam former complex response vector is built; and after an amplitude and phase constraint-based beam former space-time adaptive weight matrix is obtained through calculation, an amplitude and phase constraint-based beam former unconstrained cost function is obtained through calculation, a robust time covariance matrix and a robust space covariance matrix are calculated respectively, a robust correction space steering vector and a robust correction time steering vector are calculated respectively, a robust correction space-time steering vector is further obtained, and a final target signal through space-time processing is obtained through calculation finally.

Description

technical field [0001] The invention belongs to the technical field of radar space-time adaptive processing, in particular to a method for robust space-time adaptive processing of target signals based on amplitude-phase constraints, that is, iteratively optimized robust space-time adaptive processing (STAP) based on amplitude-phase constraints The method is suitable for obtaining better Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR) in small sample scenarios. Background technique [0002] Space-time adaptive processing (STAP) method is widely used in airborne radar systems as a powerful tool to solve the clutter suppression of moving platforms. When the clutter-impulse-noise covariance matrix of the moving platform can be estimated more accurately, the space-time adaptive processing (STAP) method has better clutter suppression performance. Since the clutter-pulse-noise covariance matrix of the moving platform is independent of the cl...

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 朱圣棋廖桂生张俊许京伟张骏杰宋萌萌王震
Owner XIDIAN UNIV
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