摘要
针对复杂海洋信道环境下,传统水声通信唤醒信号检测方法虚检率高、漏检率高、计算能力需求大等问题,通过对比分析常规唤醒信号形式与检测方法优缺点,提出了一种适用于多音唤醒信号的形态滤波方法。该方法通过分析信号累积功率谱,生成和滤除噪声包络,凸显多音唤醒信号。最后,对该算法进行了海上试验,结果表明,该算法能在复杂的海洋环境背景噪声下实现对水声通信环境信号的有效捕获。
Aiming at the problems of high false alarm rate,high missed detection rate and large computing power requirement in traditional underwater acoustic communication wake-up signal detection under complex ocean channel environment,by comparing and analyzing the advantages and disadvantages of common wake-up signal forms and detection algorithms,a morphological filtering method suitable for multitone wake-up signal is proposed.By analyzing the accumulation of power spectrum,the method produces and filters out noise envelopes to enhance the multi-tone wake-up signal.The experimental results at sea indicate that the proposed method can efficiently capture the underwater acoustic communication environment signal under the complex ocean noise.
作者
唐立赫
张锦灿
王志欣
TANG Lihe;ZHANG Jincan;WANG Zhixin(No.54 Institute of CETC,Shijiazhuang Hebei 050081,China)
出处
《通信技术》
2022年第6期701-705,共5页
Communications Technology
基金
国家自然科学基金项目(62001438)。
关键词
水声通信
唤醒信号
多音信号
形态滤波
underwater acoustic communication
wake-up signal
multi-tone signal
morphological filtering
