摘要
抗除多途信道的干扰,优化被动检测性能是声纳信号处理关注的问题之一。通过仿真揭示了多途信道中单水听器时间反转镜的聚焦效应,研究了被动迭代时间反转镜技术,对其多目标定位选择性、多目标选择聚焦性能作了研究。结果表明利用了海洋信道的相干多途特性,被动时间反转镜可实现多个目标的空间匹配滤波;利用迭代算法,被动迭代时间反转镜可在抑制环境噪声干扰的同时,在信道输出总能量强的目标处实现选择性聚焦。
Optimizing detection performance of passive sonar is important in sonar signal processing. The focusing effect of the single time reversal mirror (TRM) in multi-path channels is proved by simulation and the technique of passive iterative TRM is studied. The selective focusing and locating of TRM are studied while multi-targets exist. The results show that the passive TRM can realize the multi-targets' space matched-filtering, and combined with iterative algorithm the passive iterative TRM can be focused on the most reflective target and weaken environment noise.
出处
《声学技术》
CSCD
北大核心
2008年第4期588-592,共5页
Technical Acoustics
基金
国家重点实验室基金(9140C200305080C20)
预研项目(4010501040104)资助
关键词
时间反转
迭代算法
被动检测
time reversal mirror
iterative algorithm
passive detection