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.
作者
翟东
达新宇
张喆
梁源
薛凤凤
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)
出处
《弹箭与制导学报》
北大核心
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。
关键词
卫星通信
WFRFT
MIMO
抗截获
识别概率
satellite communication
WFRFT
MIMO
anti-interception
recognition probability
