降低基于PSWF的非正弦调制信号PAR方法  

Method of Reducing PAR of Non-sinusoidal Modulated Signals Based on PSWF

作　　者：舒根春[1] 王红星[1] 

机构地区：[1]海军航空工程学院,山东烟台264001

出　　处：《无线电通信技术》2011年第1期22-23,49,共3页Radio Communications Technology

摘　　要：针对基于椭圆球面波的非正弦调制信号峰均功率比大的问题,提出了降低峰均功率比方法。该方法根据基于椭圆球面波的非正弦调制符号时域特性,通过选择峰均功率比小于期望值的调制符号进行传输,从而达到降低调制信号峰均功率比的目的。理论分析和仿真结果表明,该方法不仅有效降低了调制信号的峰均功率比,而且不会降低通信系统的误码性能,也不会导致调制信号功率谱展宽和功率谱集中度变差。In order to resolve the problem of big peak-to-average power ratio （PAR） of uon-sinusoidal modulated signals which is based on prolate spheroidal wave function （PSWF）, a method of reducing PAR is proposed. To achieve the purpose of reducing the PAR, the modulated symbols which have PAR lower than the anticipated value are selected and transmitted. The method is based on the time-domain characteristics of modulated symbols. Theoretical analysis and simulation results show that the method not only reduces the PAR, but also doesn＇ t reduce the bit error rate performance or power spectral concentricity of modulated singals.

关 键 词：无线通信 峰均功率比 非正弦调制 椭圆球面波函数(PSWF) 

分 类 号：TN911[电子电信—通信与信息系统]