一种利用共轭编码降低RS-OFDM系统RAPR的新方法  

A New PAPR Reduction Method Using Conjugated Codes for RS-OFDM Systems

作　　者：李雯琦[1] 吴虹[1] 赵迎新[1] 戈立军[1] 谭卫毅[1] 宋士天[1] 

机构地区：[1]南开大学信息技术科学学院,天津300071

出　　处：《南开大学学报（自然科学版）》2010年第2期38-41,共4页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：天津市应用基础及前沿技术研究计划重点项目(09JCZDJC16900);国家自然科学基金面上项目(60872026)

摘　　要：针对采用M-QAM调制的RS-OFDM系统,提出一种共轭编码降低系统PAPR的新方法.根据M-QAM调制后为复数的特点,对数据进行共轭编码,通过避免各子载波同时传输相同的数据符号,来降低系统的峰值功率,实现降低系统PAPR的目的.仿真结果表明这种取共轭的编码方法能够有效降低OFDM系统的PAPR,且具有复杂性低,运算量小,易于实现等优点.According to RS-OFDM systems which were modulated by M-QAM,a new conjugated coding method was proposed to reduce PAPR in such systems.By employing the property that the signals modulated by M-QAM are complex numbers,conjugated coding is done to the signals,which can avoid the same symbol been transmitted on the subcarries synchronously, and reduce the peak power and the PAPR of systems.Simulation results suggest this new method can reduce the PAPR in RS-OFDM systems effectively,and has the advantages of low complexity,few computation and flexible to implement.

关 键 词：里德-索罗门编码正交频分复用系统 多进制正交幅度调制 峰值均值功率比 共轭编码 

分 类 号：TN914.4[电子电信—通信与信息系统]