Mutual coupling uniform linear array DOA estimation method

A uniform linear array and mutual coupling error technology, applied in the field of ultrasonic arrays, can solve problems such as decreased array accuracy, changing antenna array signal amplitude and phase, and affecting antenna array signal processing capabilities.
CN114152913APending Publication Date: 2022-03-08HARBIN UNIV OF SCI & TECH
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN UNIV OF SCI & TECH
Publication Date
2022-03-08

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a mutual coupling uniform linear array DOA estimation method, and relates to the technical field of ultrasonic arrays, and the method comprises the following steps: pre-determining an ultrasonic array structure, and carrying out the matrix reconstruction and self-correction based on a mutual coupling error matrix; carrying out a correction algorithm for proposing a uniform linear array; aiming at the limitation of an existing mutual coupling correction algorithm under an unknown mutual coupling condition, a block sparse weighting algorithm of an L1 norm optimization constraint model is adopted, the algorithm can effectively solve the DOA estimation problem of the uniform linear array under the unknown mutual coupling condition, accurate positioning of the uniform ultrasonic array is achieved, and the DOA estimation accuracy of the uniform linear array is improved. On the basis of the accuracy of the self-correction algorithm, the accurate echo direction can be effectively estimated by the ultrasonic array signal processed by the mutual coupling error self-correction algorithm and the joint approximate diagonalization algorithm.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of ultrasonic arrays, in particular to a method for estimating mutual coupling uniform linear array DOA. Background technique

[0002] As the requirements for signal detection and parameter estimation in the space domain are getting higher and higher, array signal processing as the main means of space domain processing has been rapidly developed and applied. Spatial spectrum estimation technology, as an important research field of array signal processing, has achieved Great progress has been made, and high-resolution spatial spectrum estimation and direction-finding technology have also been developed. It has the advantages of high precision, high resolution, and simultaneous measurement of multiple signals. It has broad application prospects in the military field. However, the The algorithm needs to know the flow of the array accurately, if there is an error in the flow pattern of the array, the accuracy of...

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