Compensating for intensity loss in a large-aperture MIMO sonar imaging system  

作　　者：Xionghou Liu Chao Sun Yixin Yang Jie Zhuo 

机构地区：[1]School of Marine Science and Technology,Northwestern Polytechnical University [2]State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences

出　　处：《Journal of Systems Engineering and Electronics》2016年第1期63-71,共9页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(51509204);the Opening Project of State Key Laboratory of Acoustics(SKLA201501);the Fundamental Research Funds for the Central Universities(3102015ZY011)

摘　　要：To reduce the computation burden of a large-aperture multiple-input multiple-output（MIMO） sonar imaging system,the phase-shift beamformer（PSBF） is used at the cost of bringing the intensity loss（IL）.The cause of the IL is analyzed in detail and a variable termed as IL factor is defined to quantify the loss amount.To compensate for the IL,two methods termed as intensity compensation for the PSBF（IC-PSBF） and the hybrid beamforming（HBF）,respectively,are proposed.The IC-PSBF uses previously estimated IL factors to compensate for output intensities of all PSBFs;and the HBF applies the IC-PSBF to the center beam region and the shifted-sideband beamformer（SSBF） to the side beam region,respectively.Numerical simulations demonstrate the effectiveness of the two proposed methods.To reduce the computation burden of a large-aperture multiple-input multiple-output（MIMO） sonar imaging system,the phase-shift beamformer（PSBF） is used at the cost of bringing the intensity loss（IL）.The cause of the IL is analyzed in detail and a variable termed as IL factor is defined to quantify the loss amount.To compensate for the IL,two methods termed as intensity compensation for the PSBF（IC-PSBF） and the hybrid beamforming（HBF）,respectively,are proposed.The IC-PSBF uses previously estimated IL factors to compensate for output intensities of all PSBFs;and the HBF applies the IC-PSBF to the center beam region and the shifted-sideband beamformer（SSBF） to the side beam region,respectively.Numerical simulations demonstrate the effectiveness of the two proposed methods.

关 键 词：multiple input multiple output（MIMO）sonar phase-shift beamformer sector-scan sonar shifted-sideband beamformer sonar imaging 

分 类 号：TB56[交通运输工程—水声工程]