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Robust Beamforming Method Based on Iterative Algorithm

An iterative algorithm, beam technology, applied in the field of robust adaptive beamforming processing, which can solve problems such as array vector mismatch

Inactive Publication Date: 2017-07-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to propose a robust beamforming method based on an iterative algorithm for the problem of array steering vector mismatch in the background of strong desired signals in the prior art, through LMS iterative power inversion (Power Inversion, hereinafter PI) algorithm, which reconstructs the interference noise covariance matrix, thereby directly avoiding the method of matrix inversion operation in the traditional algorithm

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  • Robust Beamforming Method Based on Iterative Algorithm
  • Robust Beamforming Method Based on Iterative Algorithm
  • Robust Beamforming Method Based on Iterative Algorithm

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[0073] The robust beamforming method based on iterative algorithm in this example, firstly, use the PI spectrum to calculate the weight of the PI algorithm; secondly, use the PI spectrum and the weight of the PI algorithm to reconstruct the interference noise covariance matrix outside the possible spatial range of the desired signal ;Finally, using the obtained reconstructed interference noise covariance matrix, calculate the optimal weight of the beamformer, and then repeat the cyclic PI algorithm, thereby updating the optimal weight vector of the beamformer.

[0074] Specifically, the weight of the PI algorithm is calculated as follows:

[0075] First, the LMS algorithm is used to iteratively calculate the weight of the PI algorithm, and the weight of the PI algorithm is calculated as w PI ;

[0076] w PI =[w 1 ,w 2 ,...,w M ] T

[0077] Among them, M is the number of array elements, T is transpose calculation, w M is the PI algorithm weight of the Mth array element....

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Abstract

The present invention relates to robust adaptive beamforming processing techniques. The present invention aims at the problem of array steering vector mismatch in the background of strong desired signals in the prior art, and proposes a robust beamforming method based on an iterative algorithm. First, the weight of the PI algorithm is calculated using the PI spectrum; secondly, the PI algorithm is used to The weights of the spectrum and PI algorithm reconstruct the interference noise covariance matrix outside the possible spatial range of the desired signal; finally, use the reconstructed interference noise covariance matrix to calculate the optimal weight of the beamformer, and then repeat the cyclic PI algorithm, Thus the optimal weight vector of the beamformer is updated. Through the LMS iterative power inversion algorithm, the interference noise covariance matrix is ​​reconstructed, thereby directly avoiding the method of matrix inversion operation in the traditional algorithm. Suitable for robust beamforming methods based on iterative algorithms.

Description

technical field [0001] The present invention relates to a robust adaptive beamforming processing technology, in particular to a robust beamforming method based on an iterative algorithm Background technique [0002] One of the most important research contents of array signal processing is beamforming technology, which can be divided into ordinary beamforming technology and adaptive beamforming technology. Using beamforming technology, it is possible to enhance the desired signal while suppressing interference. The weight coefficient of ordinary beamforming technology is fixed, and the anti-interference performance is poor. Adaptive beamforming is equivalent to a one-Wener filtering process, which can automatically adjust the weight coefficients with the changing signal environment, so that the main lobe of the beam is aligned with the desired signal direction to enhance the useful signal, and the null trap is aligned with the interference direction to suppress interference....

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
Inventor 谢菊兰王剑锋张俊波李迅罗倩李会勇王旭
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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