降低TDCS峰均功率比算法及性能分析

摘要

Concerning the problem of high Peak-to-Average Power Ratio ( PAPR) in Transform Domain Communication System ( TDCS) system, a new scheme for decreasing the PAPR is proposed. This algorithm selects the basis function with low PAPR to transmit data for obtaining a block diagram of improved TDCS transmitter, in which the basis function is generated by selecting random phases. Simulation results show that the proposed algorithm can reduce PAPR without deteriorating the BER performance of the system. This new method can reduce the PA0 by 6.1 dB when CCDF is 10-3.%针对变换域通信系统出现的高峰均功率比的问题,提出了一种降低TDCS系统峰均功率比的算法.该算法通过对随机相位进行选择,生成一定数量的基函数,并在此基础上,寻找到峰均功率比较低的基函数来传输数据,从而得到改进的TDCS框图.仿真结果表明,改进算法能在不影响TDCS的误码率性能的情况下有效降低PAPR,在CCDF为10-3时,改进算法的PA0较原始TDCS降低了6.1 dB.