一种低复杂度的电力线OFDM峰均比降低方法  

A Low Complexity Method for Peak-to-Average Power Ratio Reduction in Power Line OFDM System

作　　者：季建玲[1] 刘宏立[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电力系统通信》2011年第9期6-10,共5页Telecommunications for Electric Power System

基　　金：国家高技术研究发展计划("863"计划)(2007AA11A121);湖南省科技厅计划项目(2008FJ3114)

摘　　要：正交频分复用系统较高的峰均比大大限制了其在宽带电力线通信中的应用。为取得合适的峰均比,文章提出一种低复杂度的改进算法,将分组预判决与压扩技术相结合来降低峰均比的值,并给出了系统的实现方法,在建立的电力线信道模型基础上,对其进行了仿真。仿真结果表明,该算法能够改善信号的峰均比,减小误码率且计算复杂度低,有效地提高了电力线通信系统的性能。The high Peak-to-Average Power Ratio （PAPR） of Orthogonal Frequency Division Multiplexing （OFDM） signal limits its applications in power line communication （PLC）. In order to obtain the appropriate PAPR, the paper proposes an improved low complexity algorithm, which combined the grouping prejudgment technique with companding to reduce the PAPR values. It introduces the system implementation methods and the simulation based on power line channel mod- el. Simulation results show that the algorithm can improve the PAPR signal, reduce the error rate and have lower computational complexity. It effectively improve the performance of power line communication system.

关 键 词：OFDM 峰均比 电力线通信 压扩 

分 类 号：TN915.853[电子电信—通信与信息系统]