摘要
正交频分复用技术(Orthogonal Frequency Division Multiplexing,OFDM)非常适合高速通信系统,但存在高峰均功率比(PAPR)的问题。对OFDM系统中如何降低PARR的问题进行了研究,讨论了降低PAPR的主要方法,重点分析了选择性映射法(SLM),并在此基础上提出了一种基于预编码矩阵的改进算法,最后通过matlab进行了算法仿真,仿真结果表明,改进算法在使得OFDM系统在降低峰均功率比的性能上得到了进一步的改善。
Orthogonal Frequency Division Multiplexing （OFDM） is suitable for high-speed communication system, but it has the disadvantage of high ratio of Peak to Average Power. This article study on the problem of how to reduce the PAPR in OFDM system, talk about some main methods of PAPR reduction, focus on the selected mapping scheme （SLM）,and based on SLM, the improved algorithm of using a precoding matrix is proposed. Finally,we present the simulation research by matlab, the results show that the improved algorithm has a better performance on PAPR reduction of the OFDM system.
出处
《电子设计工程》
2013年第4期166-168,共3页
Electronic Design Engineering
