主动声呐混响抑制的空时相三维处理方法  

Active Sonar Reverberation Suppression Method Based on ST-phase United Processing

作　　者：艾锐峰[1] 蔡志明[1] 幸高翔[1] 

机构地区：[1]海军工程大学电子工程学院,武汉430033

出　　处：《电子与信息学报》2012年第5期1263-1267,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(51009146)资助课题

摘　　要：针对主动声呐的混响抑制问题,该文将空时2维的处理方法扩展到空、时、相3个维度。该方法通过3个子阵的相位匹配,利用信号相位对信号方位的依从性,从波束域、多普勒域和相位域上分离混响与目标。区别于空时自适应处理(STAP)方法,它不需要知道信号与混响的统计特性,不用进行混响协方差矩阵的估计,从而对混响的非平稳性具有更好的适应性。仿真数据及试验数据的分析证明,该方法较之传统方法能够从更低信混比中检测出目标。A Space-Time-phase （ST-phase） united processing method is proposed in this paper. It extends the processing domain form space-time to space-time-phase for separating reverberation and targets. Three sub-arrays are firstly constructed. Then, there is a phase difference between the signal parts of sub-array outputs. The value of tile phase is depended on the signal arrival orientation. With tile phase matching of signals, reverberation and targets can be detached. Unlike the Space-Time Aadaptive Processing （STAP）, there is no need to analyze the statistical properties of rew~＇rberation and the estimation of reverberation covariance matrix can be overleaped. This will improve thc adaptability in non-stationary environment. The simulation data and real data analysis prove that this method can detect out targets in a lower SNR with the compare of conventional method.

关 键 词：声呐信号处理 空时自适应处理 相位匹配 混响抑制 回波检测 

分 类 号：U666.7[交通运输工程—船舶及航道工程]