对流层散射衰落信道下OQAM/OFDM系统分析  

Analysis on OQAM/OFDM Systems under Troposcatter Fading Channels

作　　者：张凯[1,2] 薛伦生[2] 陈西宏[2] ZHANG Kai;XUE Lunsheng;CHEN Xihong(Unit 95425,PLA,Qujing 655331,China;Air and Missile Defense College,Air Force Engineering University,Xi＇an 710051,China)

机构地区：[1]中国人民解放军95425部队 [2]空军工程大学防空反导学院

出　　处：《无线电工程》2018年第11期22-25,共4页Radio Engineering

基　　金：国家自然科学基金资助项目(61671468)

摘　　要：针对大容量对流层散射通信系统中存在多径时延和多普勒效应的影响,将基于偏移正交幅度调制的正交频分复用(OQAM/OFDM)系统应用于散射通信系统。从理论上分析OQAM/OFDM系统在对流层散射信道下存在的符号间扰和载波间干扰,推导了系统的信号干扰比公式。仿真分析验证了2种典型散射信道下OQAM/OFDM系统的信号干扰比。仿真结果表明,不同的散射信道下,当信号干扰比最大时存在最优符号周期。As the influence of time delay and doppler delay in troposcatter communication,the orthogonal frequency division multiplexing system based on offset quadrature amplitude modulation is used in the troposcatter communication. First,the inter-symbol interference and inter-carrier interference in OQAM/OFDM systems under troposcatter channels are analyzed to derive the signal-tointerference ratio formula.The simulation and analysis validate the signal-to-interference ratio on two typical troposcatter channels. The simulation results show that the system has the best symbol period in different tropocatter channels when the signal-to-interference ratio is maximal.

关 键 词：对流层散射通信 大容量 OQAM/OFDM 信号干扰比 

分 类 号：TN911.5[电子电信—通信与信息系统]