摘要
基于信号掩盖思想的卫星重叠通信方法利用参数特征显著的掩体信号隐藏信道中的有用信号,旨在利用外部信号降低所传输有用信号的信干噪比(Signal to Interference plus Noise Ratio,SINR),使第三方无法实现对有用信号的正常解调。然而随着信号处理技术的进步,针对重叠信号的分离方法层出不穷,为此提出将加权类分数傅里叶变换(Weight⁃ed-type Fractional Fourier Transform,WFRFT)引入卫星重叠通信方法中,使用WFRFT变换的掩体信号能够有效增加第三方消除掩体信号的难度。仿真结果表明WFRFT掩体信号在应对第三方调制识别和解调时都具有突出表现,同时,还分析了不同参数下WFRFT信号掩盖的安全性能表现,对实际应用具有一定的指导意义。
The satellite overlap communication method based on the idea of signal concealment utilizes masking signals with significant parameter characteristics to hide the useful signal in the channel.It aims to use external signals to reduce the signal to in⁃terference plus noise ratio(SINR)of the transmitted useful signal,making it impossible for third parties to achieve normal interpre⁃tation of the useful signal.However,with the advancement of signal processing technology,separation methods for this type of sig⁃nal emerge in endlessly.Thus,it is proposed to introduce weighted-type fractional fourier transform(WFRFT)into the satellite overlapping communication method,the WFRFT masking signals can effectively increase the difficulty for third parties to eliminate masked signals.The simulation results show that the WFRFT masking signal has outstanding performance in dealing with third-par⁃ty modulation recognition and demodulation.At the same time,the safety performance of WFRFT signal masking under different pa⁃rameters is analyzed,which has guiding significance for practical applications in certain aspects.
作者
桑之昂
李加洪
刘子威
张更新
SANG Zhiang;LI Jiahong;LIU Ziwei;ZHANG Gengxin(Nanjing University of Posts and Telecommunications,Nanjing 210003;Xi'an Institute of Space Radio Technology,Xi'an 710000)
出处
《舰船电子工程》
2021年第11期89-91,133,共4页
Ship Electronic Engineering
基金
国家自然科学基金项目“面向XXXXXXXX的新型卫星通信体制研究”(编号:31504550102)资助。
关键词
加权分数傅立叶变换
信号掩盖
安全通信
性能指标
weighted-type fractional fourier transform
signal concealment
secure communication
performance indicators
