New Adaptive Beamformer for Coherent Interference Based on Multistage Blocking

Min TANG; Dong QI; Chengcheng LIU; Yongjun ZHAO

doi:10.11999/JEIT180332

Volume 41 Issue 7

Jul. 2019

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Article Navigation > Journal of Electronics & Information Technology > 2019 > 41(7): 1705-1711

Min TANG, Dong QI, Chengcheng LIU, Yongjun ZHAO. New Adaptive Beamformer for Coherent Interference Based on Multistage Blocking[J]. Journal of Electronics & Information Technology, 2019, 41(7): 1705-1711. doi: 10.11999/JEIT180332

Citation:

Min TANG, Dong QI, Chengcheng LIU, Yongjun ZHAO. New Adaptive Beamformer for Coherent Interference Based on Multistage Blocking[J]. Journal of Electronics & Information Technology, 2019, 41(7): 1705-1711. doi: 10.11999/JEIT180332

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New Adaptive Beamformer for Coherent Interference Based on Multistage Blocking

doi: 10.11999/JEIT180332

School of Data and Target Engineering, PLA Strategic Support Force Information Engineering University, Zhengzhou 450001, China

Funds: The National Natural Science Foundation of China (61703433)

Received Date: 2018-04-11
Rev Recd Date: 2019-05-16

Available Online: 2019-05-25

Publish Date: 2019-07-01

Abstract

Abstract

Since the performance of adaptive beamforming algorithm for coherent signals degrades when the estimation error in the Direction Of Arrival (DOA) of the desired signal is large, a new multistage blocking based beamforming algorithm for coherent interference suppression is proposed. Firstly, the blocking matrix is constructed and the principle of multistage blocking is derived, with which the received signal is processed to remove the desired signal component. Then the mapping between the array manifold of sub-aperture array and the full-aperture array is analyzed when only the desired signal exists in the space. On this basis, the extension transformation is derived with its effectiveness proved in the presence of interference signals. At last, the optimal weight vector of the adaptive beamformer for coherent interference is obtained by extension transformation. Requiring no prior information of the DOA of the interference signals, the new method is robust to the DOA estimation error, and can avoid the loss of array aperture. The effectiveness and superiority of the new algorithm are verified by simulation analysis.
- Signal processing,
- Robust beamforming,
- Coherent interference,
- Direction Of Arrival (DOA) estimation error,
- Multistage blocking

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References(20)

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