CAJ | 학술논문

针对正交频分复用(OFDM)系统中所具有高峰均比(PAPR)问题,提出一种改进的预留子载波降低峰均比算法-受控修剪算法.该算法为了消减OFDM时域信号中的高峰值,首先在预留载波上产生消峰用的原始核,然后将原始核循环移位移到时域信号模的最大峰值处,从而抵消最大峰值,达到降低峰均比的目的.该方法消峰过程中不会导致误码率的增加,降低峰均比效果明显.仿真例子证明了该方法的有效性.
침대정교빈분복용(OFDM)계통중소구유고봉균비(PAPR)문제,제출일충개진적예류자재파강저봉균비산법-수공수전산법.해산법위료소감OFDM시역신호중적고봉치,수선재예류재파상산생소봉용적원시핵,연후장원시핵순배이위이도시역신호모적최대봉치처,종이저소최대봉치,체도강저봉균비적목적.해방법소봉과정중불회도치오마솔적증가,강저봉균비효과명현.방진례자증명료해방법적유효성.
It is presented an improved reducing PAPR method called as controlled clipper method by tone reservation for the problem of high peak-to-average power ratio (PAPR) of Orthogonal Frequency Division Multiplexing(OFDM).In order to cancel the high PAPR in time domain OFDM signal,the kernel is first formed on the reserved subcarriers.Then,the kernel is circularly shifted to the maximum peak value,which will be reduced.Bit error rate is not increased in the process,and the result is very obvious in PAPR reduction.The effectiveness of the proposed scheme is demomtrated by simulations.