基于OQAM/OFDM的散射通信系统PAPR降低算法  

PAPR Reduction Algorithm of OQAM/OFDM-based Troposcatter Communication System

作　　者：吴鹏 陈西宏[1] 薛伦生[1] WU Peng;CHEN Xihong;XUE Lunsheng(Air and Missile Defense College,Air Force Engineering University,Xi＇an 710051,China)

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《无线电工程》2018年第11期18-21,共4页Radio Engineering

基　　金：国家自然科学基金资助项目(61671468)

摘　　要：针对传统OFDM系统峰均比降低算法不能直接应用在OFDM/OQAM系统的问题,给出了传统OFDM系统峰均比降低算法中限幅法、PST法和SLM法在OFDM/OQAM系统中的改进方法。根据对流层散射传播的特点,在AWGN、多径衰落信道下对3种方法进行了仿真,给出了3种方法的PAPR性能和对系统误码率影响曲线,比较了3种方法在OFDM/OQAM系统中的PAPR性能和误码率特性。分析结果表明,限幅法有较好的PAPR性能,但其误码率性能较差; SLM和PTS对误码率性能影响较小。The PAPR reduction algorithm of traditional OFDM system can＇t be used in OQAM/OFDM system directly.In view of this problem,this paper proposes the method of improving the clipping,PTS and SLM in OFDM/OQAM system. According to the characteristics of troposcatter propagation,three methods are simulated in AWGN and multipath fading channels,the PAPR performance and BER curve of them are given,compared the PAPR and BER performance in OQAM/OFDM system.The simulation results show that the clipping has the best PAPR performance and bad BER performance,and SLM and PTS have good BER performance.

关 键 词：对流层散射通信 峰均比 正交频分复用 交错正交幅度调制 限幅法 选择映射 部分传输序列 

分 类 号：TN929.5[电子电信—通信与信息系统]