时空关联法抗水声多途模糊研究  

Research of time and space law to anti-multipath fuzzy of underwater acoustics

作　　者：李孟学[1] 杜召平[2] 郭燕子[2] 丁翠环[2] 

机构地区：[1]中国人民解放军92213部队 [2]中国人民解放军91388部队

出　　处：《舰船科学技术》2013年第5期58-61,共4页Ship Science and Technology

摘　　要：水下声信道是相干多途信道,信号在信道中的多径传播使得接收信号序列复杂化,因而极大地增加了信号处理的难度。目前水下目标跟踪系统在实际使用中精度不高,对其原始测量数据进行分析,根据时空关联法,制定多条判据,提出选择有效脉冲的方法,研制系统事后处理软件,在多途干扰背景中提取定位解算所需的有效信息。通过海上试验验证,该方法可以准确地挑选出直达测距脉冲和测深脉冲,有效提高了系统的定位精度。Underwater sound channel is coherence multipath channel. Multipath propagation of signals in the sound channel has made received signal sequences complicated, which has increased signal processing difficulty. At present, the precision of underwater target tracking system isn＇t high in practice. According to time and space law,we have analysed resource measure data and adopted several criterions,we have brought forward a means to choose valid pulses and developed post-processing software, we have sorted out valid information for location calculation in the multichannel interference background. By means of sea trial, it is proved that the criterions can sort out the pulses of distance and depth accurately. It has improved the precision of the system effectively.

关 键 词：抗多途 时空关联 水声定位 判据 

分 类 号：TN929.3[电子电信—通信与信息系统]