基于双信号对比法的水声信号重构技术  

Underwater acoustic signal reconstruction based on dual signals contrast

作　　者：杨奋[1] 邹男[2,3] 付进[2,3] 

机构地区：[1]中国人民解放军91388部队 [2]哈尔滨工程大学水声技术重点实验室 [3]哈尔滨工程大学水声工程学院

出　　处：《声学技术》2015年第4期293-299,共7页Technical Acoustics

基　　金：国家自然科学基金(51209059;61201411);国家"863计划"(2013AA09A503)资助项目

摘　　要：针对水声信道的多途干扰问题,提出了一种适合同态系统的信号重构方法。从同态滤波技术的解卷积特性出发,推导了水声多途信道的复倒谱表达式,对比不同地点或不同时刻接收信号的倒谱特征,通过提取相似性高的成分,实现了基于双信号对比法的水声信号重构技术。仿真和试验数据处理结果验证了方法的有效性,且性能优于常规特征滤波器。According to the multi-paths of underwater acoustic channel, a new signal reconstruction method is put forward for homomorphic system. Considering the deconvolution feature of homomorphic filter, the complex cep-strum expression of the underwater acoustic multipath channel is deduced. The cepstrum features of the received sig-nals in different places or different times are compared. By extracting the high similarity, the underwater acoustic signal reconstruction method is realized based on the dual signals constrast. Numerical simulations and lake trials verify the effectiveness of the proposed method, and the performance is better than the conventional eigenfilter’s.

关 键 词：复倒谱 多途信道 信号重构 

分 类 号：TG67[金属学及工艺—金属切削加工及机床]