Waveform diversity based sonar system for target localization  

作　　者：Lijie Zhang dianguo Huang Yong Jin Yunshan Hou Min Jiang Qunfei Zhang 

机构地区：[1]College of Marine, Northwestern Polytechnical University, Xi'an 710072, P. R. China [2]Yichang Testing Technique Research Institute, Yichang 443003, E R. China

出　　处：《Journal of Systems Engineering and Electronics》2010年第2期186-190,共5页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(60572098)

摘　　要：A new monostatic array system taking advantage of diverse waveforms to improve the performance of underwater tar- get localization is proposed. Unlike the coherent signals between different elements in common active array, the transmitted signals from different elements here are spatially orthogonal waveforms which allow for array processing in the transit mode and result in an extension of array aperture. The mathematical derivation of Capon estimator for this sonar system is described in detail. And the performance of this orthogonal-waveform based sonar is an- alyzed and compared with that of its phased-array counterpart by water tank experiments. Experimental results show that this sonar system could achieve 12 dB-15 dB additional array gain over its phased-array counterpart, which means a doubling of maximum detection range. Moreover, the angular resolution is significantly improved at lower SNR.A new monostatic array system taking advantage of diverse waveforms to improve the performance of underwater tar- get localization is proposed. Unlike the coherent signals between different elements in common active array, the transmitted signals from different elements here are spatially orthogonal waveforms which allow for array processing in the transit mode and result in an extension of array aperture. The mathematical derivation of Capon estimator for this sonar system is described in detail. And the performance of this orthogonal-waveform based sonar is an- alyzed and compared with that of its phased-array counterpart by water tank experiments. Experimental results show that this sonar system could achieve 12 dB-15 dB additional array gain over its phased-array counterpart, which means a doubling of maximum detection range. Moreover, the angular resolution is significantly improved at lower SNR.

关 键 词：SONAR orthogonal signal transmission CAPON target localization. 

分 类 号：TN958[电子电信—信号与信息处理] U666.7[电子电信—信息与通信工程]