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Wave arrival direction estimation method under array error

A technology of direction of arrival estimation and array error, which is applied in radio wave direction/bias determination systems, direction finders using electromagnetic waves, direction finders using radio waves, etc., and can solve the performance degradation and failure of super-resolution direction finding algorithms. And other issues

Active Publication Date: 2015-10-07
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

At this time, the performance of these super-resolution direction-finding algorithms will drop significantly, or even fail completely.

Method used

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  • Wave arrival direction estimation method under array error
  • Wave arrival direction estimation method under array error
  • Wave arrival direction estimation method under array error

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Embodiment Construction

[0041] Below in conjunction with accompanying drawing, the present invention will be further described:

[0042] Depend on Figure 1-Figure 3 Described is the comparison between the real value and the estimated value of the error matrix of the DOA estimation algorithm under the array error proposed by the present invention. It can be seen that the estimated value of the error matrix is ​​very close to the real value, which illustrates the accuracy of the algorithm proposed by the present invention. Figure 4-Figure 6 Described is the performance comparison between the DOA estimation algorithm under the array error proposed by the present invention and other algorithms. As can be seen from the figure, with the increase of signal-to-noise ratio (SNR), each algorithm estimation error all increases thereupon, but the algorithm estimation error that the present invention proposes is obviously smaller than other two kinds of algorithms, thereby illustrates that the algorithm that th...

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Abstract

The invention relates to wave arrival direction estimation method under an array error. First the method utilizes sparsity of a matrix, expresses wave arrival direction estimation under the array error by solving an optimization problem, and then converts the optimization problem into an iterative algorithm to realize. Compared with an existing wave arrival direction estimation algorithm under an array error, the estimation method proposed by the invention has remarkably improved estimation performance under the condition of equivalent complexity, and has good application prospects in the field of direction estimation.

Description

technical field [0001] The invention relates to a direction-of-arrival estimation method under an array error, in particular to a method for jointly estimating an array error disturbance parameter and a signal source direction angle by an array output signal. Background technique [0002] Array signal processing is an important branch in the field of modern signal processing. Its main purpose is to extract the received signal and its characteristic signal, enhance the desired useful signal, and suppress useless interference and noise. Compared with the traditional signal processing method based on a single sensor, the array signal processing technology using sensor array has the advantages of flexible beam control, high signal gain, high spatial resolution, and strong anti-interference ability. Spatial spectrum estimation is one of the main research directions in the field of array signal processing. It focuses on estimating the spatial signal of the space signal. The main p...

Claims

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Application Information

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IPC IPC(8): G01S3/14G01S3/782G01S3/802
CPCG01S3/14G01S3/782G01S3/802
Inventor 刘宏清黎勇赵陆明
Owner CHONGQING UNIV OF POSTS & TELECOMM
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