摘要
正交频分复用(OFDM)作为一种特殊的多载波传输(MCM)方案,具有较高的频带利用率和良好的抗多径干扰能力。但较高的峰均功率比(PAPR)是限制其应用的一个主要缺点。选择性映射(SLM)算法是无失真降低OFDM系统PAPR的有效方法,但其复杂度较高。因此提出了一种基于SLM的抑制PAPR的改进算法。仿真结果表明,该方法即有效地降低了SLM实现的复杂度,又大幅降低了PAPR,提高了OFDM系统性能。
As a kind of special project of MCM,OFDM has efficient spectrum utilization and good resistance to multipath interference.But high PAPR is one of the main disadvantages which restrict its application.SLM is an effective algorithm to reduce PAPR of OFDM signal without distortion,however,the complexity is quite high.Therefore an improved algorithm for PAPR reduction is put forward.The simulation result shows that the improved algorithm both reduces the realization complexity of SLM and the PAPR efficiently which improves the performance of OFDM system.
出处
《信息技术》
2011年第3期97-99,共3页
Information Technology
