摘要
为提高通信系统的隐蔽性能,提出了基于多参加权分数阶傅里叶变换（MP-WFRFT）通信系统的预编码设计方案.通过对MP-WFRFT信号的时域、频域分量定量分析,推导出MP-WFRFT星座的模糊、裂变规律;搭建了基于MP-WFRFT的星座预编码优化系统,并采用遗传算法（GA）进行相关模型优化求解.仿真结果表明：通过星座预编码参数的合理设计,MP-WFRFT系统能够从低概率检测、低概率调制识别、低概率参数截获三个方面不同程度地提升系统的隐蔽性能.确保了合法通信双方的通信安全,使之能够运用到隐蔽通信设计之中.
A constellation precoding scheme was proposed based on multiple parameters weighted fractional Fourier transform（MP-WFRFT） to improve the communication system？s concealment.Through quantitative analysis about the MP-WRRFT signal？s time-domain and frequency-domain parts, the MP-WFRFT constellation ？ s blurring and splitting rules were deduced. The constellation precoding system was also built based on MP-WFRFT, and genetic algorithm（GA） was adopted to solve the corresponding optimization program.Simulation results show that when the parameters in the constellation precoding system based on MP-WFRFT are set properly,the system can help improve the system？s concealment in the following aspects：low probability detection（LPD）,low probability modulation recognition（LPMR）,and low probability parameter interception（LPPI）,which can guarantee the legitimate communications？ security and be applied into the covert communications.
作者
梁源
达新宇
徐瑞阳
倪磊
Liang Yuan Da Xinyu Xu Ruiyang Ni Lei(Information and Navigation Institute, Air Force Engineering University, Xi＇an 710077, Chin)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第2期72-78,共7页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(61271250,61571460)
关键词
隐蔽通信
多参加权分数阶傅里叶变换
星座预编码
遗传优化
抗截获
covert communications
multiple parameters weighted fractional Fourier transform （MP-WFRFT）
constellationprecoding
genetic algorithm optimization
anti interception
