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Two-dimensional DOA estimation and cross-coupling correction method based on rank loss estimation

A technology of rank loss and estimated value, which is applied in the field of two-dimensional DOA estimation and mutual coupling correction, which can solve the problems of high calculation amount, array aperture loss, and large amount of calculation of spectral peak search, and achieves high estimation success rate and root mean square. Less error, better effect

Pending Publication Date: 2021-02-19
BEIJING UNIV OF TECH
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Problems solved by technology

The two-dimensional MUSIC algorithm is a typical two-dimensional DOA estimation algorithm, which can achieve asymptotic unbiased estimation of two-dimensional angles, but its implementation requires spectral peak search in two-dimensional space, resulting in excessive calculation
This algorithm will cause a loss to the array aperture, and the calculation of the spectral peak search is also relatively large

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  • Two-dimensional DOA estimation and cross-coupling correction method based on rank loss estimation
  • Two-dimensional DOA estimation and cross-coupling correction method based on rank loss estimation
  • Two-dimensional DOA estimation and cross-coupling correction method based on rank loss estimation

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[0026] The present invention will be further described below in conjunction with the accompanying drawings and implementation steps.

[0027] The flow chart of the two-dimensional DOA estimation and mutual coupling correction method based on rank loss estimation is as follows figure 1 shown, including the following steps:

[0028] Such as figure 1 Shown is the flow chart of the present invention.

[0029] The first step: Considering the existence of mutual coupling error, the uniform area array model is studied, the number of array elements is M×N, and the array element spacing is d x and d y ; At a time t, consider K far-field narrowband signals with is incident on the array at an angle of , represents the azimuth and elevation angles of the kth signal, then the output response of the array is expressed as

[0030] x(t)=CAs(t)+n(t) (1)

[0031] where C represents the mutual coupling matrix, represents the ideal array response matrix, where s(t) represents the s...

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Abstract

The invention discloses a two-dimensional DOA estimation and mutual coupling correction method based on rank loss estimation, and belongs to the technical field of array signal processing. The methodcomprises the following steps: constructing a signal receiving model of a uniform planar antenna array under a mutual coupling error by constructing a mutual coupling error matrix; separating information source data from a cross-coupling error vector by utilizing a transformation domain relationship of parameter mapping, and constructing a corresponding spectral peak search function by utilizing arank loss estimation criterion to realize estimation of two-dimensional azimuth parameters; and finally constructing a decoupling matrix by utilizing the obtained estimated azimuth parameters to realize estimation of a cross-coupling matrix, and further performing cross-coupling correction according to the estimation result. On the basis, proper simulation is used for verifying the estimation result of the proposed method, and compared with an existing estimation algorithm, the proposed method has the advantages that the root-mean-square error of the DOA estimation result is smaller, the estimation success rate is higher, and it shows that the performance of the proposed method is better.

Description

technical field [0001] The invention relates to the related field of array signal processing, can be applied to wireless communication, radar positioning and the like, and is especially suitable for solving the problems of two-dimensional DOA estimation and mutual coupling correction under the condition of mutual coupling errors in the antenna array. Background technique [0002] Array signal processing has always been one of the hot research directions of many scholars. Because it has many applications in satellite communication, radar detection, underwater positioning, etc., related technologies have been widely and rapidly developed in recent years. . The purpose of array signal processing is to sample the data received by the array, and then calculate through the analysis algorithm, so as to obtain the parameter information of the expected signal. [0003] Direction of Arrival (DOA) estimation is an important branch of array signal processing. The main purpose of DOA e...

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 窦慧晶杨帆肖子恒
Owner BEIJING UNIV OF TECH
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