基于稀疏时频分解的盲波束形成算法

doi:10.11999/JEIT160995

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Abstract

A novel blind beamforming algorithm based on sparse Time-Frequency Decomposition (TFD) is proposed to solve the problems of existing blind beamforming algorithms: poor universality and the requirement of large amount of sampling data. In the proposed algorithm, the traditional Short-Time Fourier Transform (STFT) is first formulated as a sparse reconstruction problem. Then, a fast and efficient algorithm based on the alternating split Bregman technique is utilized to carry out the optimization. By combining the clustering and uncertainty set methods, the sparse-TFD results of the receiving data at each sensor are used to realize the estimation of Steering Vectors (SV). Finally, the optimal weight coefficients are achieved by substituting the estimated SV into the MVDR beamformer. The proposed algorithm hardly needs any specific statistical property of the receiving signals. Simulation results demonstrate that this algorithm can achieve superior output performance over the existing blind beamforming methods. It needs few snapshots with lower computational cost and has fast convergence rate, which makes the algorithm easy to utilize in practical applications.

Key words： Blind beamforming Time-frequency decomposition Sparse reconstruction Steering vector estimation

Received: 29 September 2016 Published: 13 December 2016

PACS:

TN911.7

Fund:

The National Natural Science Foundation of China (61401469)

Corresponding Authors: CHEN Pei E-mail: clevercpei@126.com

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	CHEN Pei
	ZHAO Yongjun
	LIU Chengcheng

Cite this article:

CHEN Pei,ZHAO Yongjun,LIU Chengcheng. Blind Beamforming Algorithm Based on Sparse Time-frequency Decomposition[J]. JEIT, 2016, 38(12): 3078-3084.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT160995 OR http://jeit.ie.ac.cn/EN/Y2016/V38/I12/3078

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