自适应旁瓣抵消器在混响背景下性能研究与分析  

Performance study and analysis of adaptive sidelobe canceller under condition of reverberation

作　　者：惠俊英 周伟 

机构地区：[1]哈尔滨工程大学水声技术国防科技重点实验室,哈尔滨150001

出　　处：《声学技术》2010年第2期218-223,共6页Technical Acoustics

基　　金：水声技术国防科技重点实验室基金项目(9140C200101080C2005)

摘　　要：分析了声纳多目标背景环境下声场方位谱的特性,并推导了适合此背景的最优自适应权。针对阵元数分别为奇数和偶数两种情况,采用了与其相匹配的方位陷波矩阵取得自适应旁瓣抵消器的参考信号,并通过推导和仿真验证了这两种方位陷波矩阵的适用性。仿真结果表明此方法较常规方位谱估计(CBF)可以得到更低的旁瓣,更尖锐的主瓣。利用实际海试数据对此方法进行了检验,探讨了基于奇、偶阵元数的自适应旁瓣抵消器对混响的响应,结果表明,与CBF相比可以得到更低的旁瓣,使主峰更尖锐,有利于目标检测能力的提高。The characteristics of the multi-targets＇ spatial spectrum in acoustic field is analyzed in the paper, and the adaptive weight suitable to this condition is derived.Two null-steering matrixes for odd and even arrays to get reference signal are presented, and verified by formula deduction and simulation.In comparison with CBF this method can get lower sidelobe and narrower mainlobe.Its response to reverberation is studied by experimental data.And the result shows that it does get lower sidelobe and narrower mainlobe compared with CBF.And the detection ability is improved.

关 键 词：自适应旁瓣抵消 陷波矩阵 指向性 混响 

分 类 号：TB556[理学—物理]