改善高分辨逆波束形成检测性能方法研究  

The research of detection performance improving method for high-resolution inverse beam-forming

作　　者：郑恩明[1,2] 孙长瑜[1] 陈新华[1] 余华兵[1] 

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院大学,北京100190

出　　处：《信号处理》2013年第5期570-576,共7页Journal of Signal Processing

基　　金：国家海洋公益性行业科研专项经费项目(201005001)资助课题

摘　　要：针对常规逆波束形成(IBF)不能突破瑞利限问题,相关学者提出一种基于自回归(AR)模型的逆波束形成算法(AR_IBF)来提高逆波束形成的方位分辨率,但该算法相比IBF在实际应用中的检测性能较差。本文通过修改AR模型来改善高分辨率逆波束形成算法(AR_IBF)的检测性。修正后的逆波束形成算法(MAR_IBF)在保证对目标方位的高分辨率检测的同时,在较低信噪比条件下可实现对目标方位的有效检测。理论分析和数值仿真验证了本算法对目标的检测性能提高了近10logN dB(N为阵元数)。Some scholars suggest that we use autoregressive （AR） model solve the problem that the conventional inverse beam-forming （IBF） is unable to break through the Rayleigh limit, and improve the bear resolution for inverse beam-form- ing, but the detection performance of this method （AR_IBF） is worse in the practical application. A modified method （MAR_IBF） is advanced for AR_IBF by modifying the AR in this paper, and which has good detection performance and bear resolution. Theory analysis and numerical simulation show that the detection performance of MAR_IBF is improved near 101ogN dB（ N being number of elements） , compared to the detection performance of AR_IBF.

关 键 词：逆波束形成 目标检测 检测性能 

分 类 号：TB565[交通运输工程—水声工程]