MP-WFRFT调制信号星座裂变参数特性研究  

Research on constellation fission parameter characteristics by virtue of MP-WFRFT modulated signals

作　　者：江彬 杨宇晓[1] 高萍 JIANG Bin;YANG Yuxiao;GAO Ping(College of Astronautics,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航天学院,江苏南京210016

出　　处：《现代电子技术》2021年第17期61-66,共6页Modern Electronics Technique

基　　金：国家自然科学基金(61701226)。

摘　　要：多参数加权分数阶傅里叶变换(MP-WFRFT)是一种新的变换域调制方法。通过加权分数阶傅里叶域的信号处理,可将通信信号调制特征改变为其他类型,以提高通信信号的安全性能,为电子对抗中的信号伪装、调制域加密等对抗手段提供了新的解决思路。针对4-WFRFT变换域调制方法,从理论上推导了QPSK信号星座裂变的原理,重点分析了4-WFRFT中的关键参数,并利用Matlab对裂变关键参数取值进行了仿真分析,最后在FPGA+AD9361软件无线电平台上实现了QPSK信号的4-WFRFT调制。仿真及实验结果表明,4-WFRFT调制可以使原有信号的调制星座图产生分裂,改变原有信号的调制特征,从而提高通信信号的安全能力。Multiple parameters weighted-type fractional Fourier transform(MP-WFRFT)is a new modulation method in transform domain. The modulation characteristics of the communication signals can be changed into other types by the signal processing of the weighted-type fractional Fourier domain,so as to improve the security performance of the communication signals,and provide a new solution for the countermoves such as signal camouflage and modulation domain encryption in electronic countermeasures.According to 4-WFRFT transform domain modulation method,the principle of QPSK(quadrature phase shift keying) signal constellation fission is deduced theoretically. The analysis of the key parameters of 4-WFRFT is taken as the focus of the research. Matlab is adopted to make a simulated analysis on the key parameter values of the fission. The QPSK signals are subjected to 4-WFRFT modulation on FPGA + AD9361 software radio platform. The simulation and experimental results show that 4-WFRFT modulation can make the modulation constellation of the original signals split and change the modulation characteristics of the original signals,so as to improve the security capability of the communication signals.

关 键 词：星座裂变 信号调制 MP-WFRFT 电子对抗 信号处理 变换域通信 仿真分析 

分 类 号：TN911.3-34[电子电信—通信与信息系统]