基于分数阶小波变换的无线物理层信号水印嵌入方法  

Fractional Wavelet Transform-based Watermark Embedding Method for Physical Layer Signal in Wireless Network

作　　者：谭齐[1] 田永春[1] 陈捷[1] 赵太银[2] TAN Qi;TIAN Yong-chun;CHEN Jie;ZHAO Tai-yin(No.30 Institute of CETC, Chengdu Sichuan 610041, China;University of Electronic Science and Technology of China, Chengdu Sichuan 611731, China)

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041 [2]电子科技大学通信与信息工程学院,四川成都611731

出　　处：《通信技术》2018年第1期178-183,共6页Communications Technology

摘　　要：无线网络物理层信号水印嵌入方法借鉴了图像中数字水印思路,将秘密的安全认证编码或标签与主传输消息一起传输,具有不需要消耗额外带宽、安全性更强的特点。鉴于此,提出了基于分数阶小波变换的信号水印嵌入方法。该方法最明显的优点是分数阶小波变换通过调节阶次可以实现调节小波系数的目的,收发双方如果预先不知道分数阶的阶次则无法恢复水印信号,因此比传统小波变换进一步提高了物理层水印信号的安全性。最后,通过性能分析验证了以上结论。The watermark signal embedding method for wireless-network physical layer, in reference to the idea of image digital watermarking, transmits the secret security authentication code or label together with the main transmission message, and this requires no additional consuming of bandwidth and is of more strong security. In view of this, the watermark embedding method based on fractional wavelet transform is proposed. The most obvious advantage of this method is that the fractional wavelet transform can adjust the wavelet coefficients by adjusting the order. Both the sender and receiver, if not knowing the order of fractional order in advance, could not restore the watermark signal, so the security of physical-layer watermark signal is further improved as compared with the traditional wavelet transform. Finally, the simulation analysis indicates the above conclusions.

关 键 词：信号水印 分数阶小波变换 小波变换 安全性 

分 类 号：TN918[电子电信—通信与信息系统]