一种基于中心矩的波束形成算法  

Beamforming Algorithm Based on Central Moment

作　　者：谷新禹[1,2] 李秀坤[1,2] 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《电子学报》2014年第7期1374-1378,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.51279033);黑龙江省自然科学基金(No.F201346)

摘　　要：高分辨水下目标探测一直是水声信号处理中的重要课题之一.然而许多高分辨算法如MUSIC,ESPRIT需要对信源数进行预估,估计的精确度对算法性能影响很大,制约了算法的实用性.本文提出了一种新的高分辨方位估计算法,中心矩波束形成算法.该方法利用了加权基元信号的各阶中心矩,无需先验信息.本文详细论述了中心矩波束形成算法的原理,对比其他算法指出了该算法性能上的优势.计算机仿真实验表明:中心矩波束形成算法拥有良好的分辨率和旁瓣级,与理论分析的结论一致.The high-resolution underwater target detection has always been one of the important issues in the underwater a- coustic signal processing.However,many of the high-resolution algorithms,such as MUSIC ESPRIT,suffer from poor estimation of the signal numbers which makes the direction-of-arrival （DOA） performance bad.A new high-resolution DOA method is proposed which makes use of the central moment without the prior information. The principle of the new method is explained and the advan- tage over other algorithms is discussed. Simulation result shows that the performance of proposed method which has good resolution and low sidelobe level is close to the conclusions of the theoretical analysis.

关 键 词：水下目标探测 中心矩 波束形成 高分辨 

分 类 号：TN911.7[电子电信—通信与信息系统]