Time permutation and phase rotation for OFDM peak-to-average power ratio reduction
利用时频二维处理降低OFDM系统峰均比*

This paper introduced PAPR reduction approach termed time permutation and phase rotation (TPPR) for OFDM systems,which exploited the additional freedom degrees of time domain symbols in one timeslot to obtain additional PAPR reduction gains. For complexity reduction,proposed two suboptimal schemes time shifting (TS-TPPR) and random selecting (RS-TPPR).Simulation results show that, at the 10-4 PAPR reduction probability,the methods can obtain at least 3 dB PAPR reduction gains, and compared to multi-symbol SLM, RS-TPPR can provide about 1dB performance gains with the same complexity.