低信噪比下卫星通信信号的非线性增强算法  

Non-linear Enhancing Algorithm of Satellite Communication Signal under Low Signal-to-noise Ratio Condition

作　　者：刘进[1] LIU Jin(The 20th Research Institute of CETC,Xi＇an 710068,China)

机构地区：[1]中国电子科技集团公司第二十研究所,陕西西安710068

出　　处：《舰船电子对抗》2018年第3期79-83,共5页Shipboard Electronic Countermeasure

摘　　要：为改善低信噪比条件下的卫星通信信号接收性能,提出采用非线性随机共振的卫星通信信号增强算法。该算法通过研究卫星通信信号、背景噪声和非线性随机共振系统三者之间的共振匹配关系,采用调节随机共振系统参数的方法,使得卫星通信信号、背景噪声和非线性随机共振系统三者之间达到共振匹配状态,实现噪声能量向卫星通信信号能量进行转移,消除噪声的同时增强了接收信号。MATLAB仿真结果表明采用非线性随机共振技术可有效改善低信噪比条件下的卫星通信信号接收性能,在未来卫星通信信号处理领域具有潜在的应用价值。To improve the satellite communication signal receiving performance under low signal-tonoise ratio condition,a novel satellite communication signal enhancing algorithm using non-linear stochastic resonance is proposed.For the algorithm,the resonance matching relationships among the received satellite communication signals,the background noise and the non-linear stochastic resonance systems are studied,by tuning the parameters of stochastic resonance systems,the stochastic resonance condition among satellite communication signal,background noise and non-linear stochastic resonance system is matched,then the energy is transferred from the noise to useful satellite communication signals,which eliminates the noise and enhances the received satellite communication signals at the same time.MALAB simulation results show that the receiving performance of satellite communication signals is significantly improved when using non-linear stochastic resonance system,which may have potential application value in satellite communication signal processing domain.

关 键 词：卫星通信信号 低信噪比 信号增强 非线性随机共振 

分 类 号：TN927.2[电子电信—通信与信息系统]