基于改进谱减算法的水声通信信号检测方法  

Detection method of underwater acoustic communications signal based on improved spectral subtraction algorithm

作　　者：王大宇[1] 王志欣 张光普[2] WANG Dayu;WANG Zhixin;ZHANG Guangpu(The 54th Research Institute of CETC,Shijiazhuang 050081,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2020年第3期69-73,共5页Applied Science and Technology

基　　金：国家自然科学基金企业创新发展联合基金项目(U19B2028);国家重点研发计划项目(2017YFC0306900)。

摘　　要：针对水声信道环境噪声干扰严重,信号接收信噪比低,导致水声通信信号检测困难的问题,本文在传统双滑窗检测的基础上,提出基于改进谱减算法与双滑窗检测相结合的水声通信信号检测方法。借鉴语音信号增强思想,将接收的水声通信信号进行谱减降噪处理,提高信号接收信噪比;结合双滑窗检测技术,实现负信噪比下水声通信信号的检测。仿真结果表明,在接收信噪比为-10 dB的情况下,仍可实现水声通信信号的正确检测。In view of the problem that the environment noise interference of underwater acoustic channel is serious and the signal-to-noise ratio of signal reception is low,which leads to the difficulty of signal detection in underwater acoustic communications.On the basis of double sliding window detection,an underwater acoustic signal detection method based on the combination of improved spectrum subtraction algorithm and double sliding window detection is proposed.Using the idea of speech signal enhancement for reference,the received underwater acoustic communications signal is processed by spectrum subtraction and noise reduction to improve the received signal-to-noise ratio.Combined with double sliding window detection technology,the detection of underwater acoustic communications signal with negative signal-to-noise ratio is realized.The simulation results show that the correct detection of underwater acoustic communications signal can still be realized when the received signal-to-noise ratio is-10 dB.

关 键 词：水声通信 信号检测 降噪 谱减 双滑窗 多窗谱 水声信道 海洋环境噪声 

分 类 号：TN911.7[电子电信—通信与信息系统]