一种基于时分数据调制的加权分数阶傅里叶变换通信方法  

A Communication Method Based on Time Division Modulation Weighted Fractional Fourier Transform

作　　者：张笑宇[1] 冯永新[1] ZHANG Xiaoyu;FENG Yongxin(Key Laboratory of Information Network and Information Countermeasure Technology of Liaoning Province, Shenyang Ligong University, Shenyang 110159, Liaoning, China)

机构地区：[1]沈阳理工大学辽宁省信息网络与信息对抗技术重点实验室,辽宁沈阳110159

出　　处：《兵工学报》2020年第7期1360-1367,共8页Acta Armamentarii

基　　金：国防基础科研计划研究项目(2018);辽宁省特聘教授计划项目(2017);辽宁省高校创新团队计划项目(L2017)。

摘　　要：加权分数阶傅里叶变换是一种新型物理层保密通信方式,可极大地提高通信系统的抗调制方式识别能力。针对单参数加权分数阶傅里叶变换易被破解的不足,提出一种基于时分数据调制的加权分数阶傅里叶变换通信方法。该方法采用奇偶位不同调制的策略,充分利用旋转因子动态加密,进行时分数据加权分数阶傅里叶变换调制,减弱信道中噪声对信号的影响,从而提高加权分数阶傅里叶变换调制信号的可靠性和安全性。仿真结果表明:基于时分数据调制的加权分数阶傅里叶变换调制信号,能够提高传统加权分数阶傅里叶变换信号的可靠性,显著降低窃听方的破译能力,可进一步增强信息传输的保密性能。The weighted fractional Fourier transform(4-WFRFT)is a new physical layer secret communication method,which can greatly improve the anti-modulation identification of the communication system.For the deficiencies of single-parameter weighted fractional Fourier transform,a time division modulation weighted fractional Fourier transform(TM-WFRFT)communication method is proposed.The proposed method adopts the strategy of different parity modulation and makes full use of the rotation factor to encrypt dynamically,so the security of the 4-WFRFT signal can be improved by time-division data weighted fractional Fourier modulation.The simulated results show that TM-WFRFT can significantly improve the 4-WFRFT reliability and significantly reduce the ability of the eavesdropper to decipher,thus improving the effectiveness of signal transmission and further enhancing the confidentiality of information transmission.

关 键 词：安全通信 加权分数阶傅里叶变换 时分数据调制 抗截获性 

分 类 号：TN975[电子电信—信号与信息处理]