CAJ | 학술논문

首先对指数压扩函数进行化简，然后提出了一种新的降低正交频分复用（OFDM）系统峰均比的非线性压扩方案。该方案在保持信号压扩前后平均功率不变的前提下，可根据实际工程中对峰均比（PAPR）和误比特率（BER）性能的需要调整其参数。计算机仿真表明，与另外3种方案相比，新的压扩算法能有效地降低峰均比，并且保持较低的误比特率。
수선대지수압확함수진행화간，연후제출료일충신적강저정교빈분복용（OFDM）계통봉균비적비선성압확방안。해방안재보지신호압확전후평균공솔불변적전제하，가근거실제공정중대봉균비（PAPR）화오비특솔（BER）성능적수요조정기삼수。계산궤방진표명，여령외3충방안상비，신적압확산법능유효지강저봉균비，병차보지교저적오비특솔。
In this paper,firstly the formula of the exponential companding schemes,is simplified propose a new nonlinear companding is proposed transform to reduce the Peak-to-Average Power Ratio (PAPR)of Orthogonal Frequency Division Multiplexing (OFDM). The proposed companding transform can always keep the average power un- changed,in addition,its parameter is adjustable to meet kinds of project demands on PAPR reduction and Bit Error Rate(BER)performance. Computer simulation shows that it can effectively reduce the PAPR and keep lower BER compared with three other schemes.