多层WFRFT-MIMO卫星通信系统抗截获性能研究  

Research on Anti-intercept Performance of Multi-layer WFRFT-MIMO Satellite Communication System

作　　者：翟东 达新宇[1] 张喆 梁源[1] 薛凤凤[1] ZHAI Dong;DA Xinyu;Zhang Zhe;Liang Yuan;Xue Fengfeng(Information and Navigation College,Air Force Engineering University,Xi’an 710077,China;No.95129 Unit,Henan Kaifeng 475003,China)

机构地区：[1]空军工程大学信息与导航学院,西安710077 [2]95129部队,河南开封475003

出　　处：《弹箭与制导学报》2021年第1期70-75,共6页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(61571460)资助。

摘　　要：针对卫星通信安全性不高、易被截获、频谱资源紧张的问题,提出一种多层加权类分数阶傅里叶变换(ML-WFRFT)与多输入多输出(MIMO)技术相结合的通信系统。ML-WFRFT提高了信号的抗截获性,MIMO技术提高了频谱利用率,并且对基于高阶累计量(HOC)的识别方法进行改进,通过识别概率定量分析了通信系统的抗截获性能。随着调制阶数的增大,抗截获性能在不断增强,当两个调制阶数分别为0.7,0.8,信噪比在[0,2]范围时,QPSK信号的正确识别概率小于0.06。This paper proposes a new kind of anti-interception communication system based on Multi-layer weighted-type fractional Fourier transform(WFRFT)and multiple input multiple output(MIMO).ML-WFRFT improves anti-interception performance of the signal and MIMO improves spectrum utilization.The recognition method based on higher-order cumulants(HOC)is improved,and the anti-interception performance of the communication system is quantitatively analyzed through the recognition probability.As the modulation order increases,the anti-intercept performance is continuously enhanced.When the two modulation orders are 0.7 and 0.8,respectively,the signal-to-noise ratio is in the range of[0,2],the correct recognition probability of QPSK signal is less than 0.06.

关 键 词：卫星通信 WFRFT MIMO 抗截获 识别概率 

分 类 号：TN914.42[电子电信—通信与信息系统]