Unlock instant, AI-driven research and patent intelligence for your innovation.

A Weighted Sparse Constrained Robust Design Method for Capon Beamformers

A sparse constraint, robust design technology, applied in instruments, radio wave measurement systems, etc., can solve the problem of inability to obtain low sidelobe level and deep interference null at the same time, achieve robust anti-angle mismatch ability, high output signal interference The effect of noise ratio

Inactive Publication Date: 2017-07-14
NORTHWESTERN POLYTECHNICAL UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sparse constraint on the beam response in this method is uniformly imposed on all azimuths, and it is impossible to obtain low sidelobe levels and deep interference nulls at the same time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Weighted Sparse Constrained Robust Design Method for Capon Beamformers
  • A Weighted Sparse Constrained Robust Design Method for Capon Beamformers
  • A Weighted Sparse Constrained Robust Design Method for Capon Beamformers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0021] The technical solution adopted by the present invention to solve the existing problems can be divided into the following 2 steps:

[0022] 1) Construct the covariance matrix according to the sampled data, use the eigendecomposition to obtain the signal subspace and the noise subspace, and use the orthogonality between the signal subspace and the noise subspace to construct the weighting matrix.

[0023] 2) Use the constructed weighting matrix to weight the sparse constraint items in SCCB to obtain WSCCB, which has higher output SINR than SCB and SCCB, and better anti-angle mismatch ability.

[0024] The specific content involved in step 1) is as follows:

[0025] Use the array to collect signals to obtain the data sampling matrix X, and use X to obtain the covarianc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a weighted sparsity-constrained robust design method of a Capon beam former. The method includes the following steps that: a covariance matrix is constructed according to sampled data, and a signal subspace and a noise subspace can be obtained through utilizing feature decomposition, and a weighting matrix can be constructed through utilizing the orthogonality of the signal subspace and the noise subspace; and weighting is performed on sparse constraints in an SCCB (sparsity-constrained capon beamformer) through utilizing the constructed weighting matrix, so that a WSCCB (weighted sparsity-constrained capon beamformer) can be obtained, and output SINR higher than those of an SCB and the SCCB and better angle mismatch prevention ability can be obtained.

Description

technical field [0001] The invention relates to an array signal processing method. Background technique [0002] The Standard Capon Beamformer (Standard Capon Beamformer: SCB) achieves the purpose of suppressing interference and noise by minimizing the output power of the array and ensuring no distortion of the signal at the desired angle (Capon J. High-resolution frequency-wavenumber spectrum analysis.Proc.IEEE , 1969; 57(8):1408-1418.). However, SCB requires a sufficient number of sampling snapshots and an accurate knowledge of the array flow pattern vector of the desired signal. When the number of snapshots is small, the SCB will produce a high sidelobe beam response, which will reduce the array output Signal to Interference-plus-Noise Ratio (SINR) and lead to an increase in the probability of false alarms of the system. When there is an angle mismatch between the desired signal direction of arrival and the actual direction of arrival, the SCB will mistake the desired s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36
CPCG01S7/2813G01S7/2925G01S7/36
Inventor 孙超刘振刘雄厚卓颉杨益新
Owner NORTHWESTERN POLYTECHNICAL UNIV