摘要
面对水下通信信号的识别问题,在恒包络通信信号中秘密地嵌入信息的研究是非常有价值的。因此,提出了一种基于时域置乱的恒包络水声通信信号水印嵌入技术。通过在时域中置乱时序的方式来嵌入数字水印,并且综合考虑信道与噪声的影响,对水印的隐蔽性和鲁棒性进行仿真分析。仿真结果表明,该算法不改变原信号恒包络特性,解决了恒包络通信信号的水印嵌入问题。同时在不同的水平接收距离和噪声下水印提取的误码率较低,这表明水印的鲁棒性较好。
Facing the recognition problem of underwater communication signals,the research of secretly embedding informa-tion in constant-envelope communication signals is very valuable.Therefore,a watermark embedding technology of constant enve-lope underwater acoustic communication signal based on time-domain scrambling is proposed.The digital watermark is embedded by scrambling the time sequence in the time domain.And considering the influence of channel and noise comprehensively,the con-cealment and robustness of the watermark are simulated and analyzed.The simulation results show that the algorithm does not change the constant envelope characteristics of the original signal,and solves the watermark embedding problem of the constant en-velope communication signal.At the same time,the bit error rate of watermark extraction under different levels of receiving distance and noise is lower,which shows that the watermark is more robust.
作者
芮超群
何呈
RUI Chaoqun;HE Cheng(School of Electronic Information,Jiangsu University of Science and Technology,Zhenjiang 212000)
出处
《计算机与数字工程》
2023年第12期2889-2894,共6页
Computer & Digital Engineering
基金
国家自然科学青年基金项目(编号:12004143)
海洋智能装备与系统教育部重点实验室开放基金项目(编号:MIES-2020-09)资助。
关键词
数字水印
恒包络
通信信号
时域置乱
digital watermark
constant envelope
communication signal
time-domain scrambling
