音频保留法降低OFDM信号的峰均功率比，其中使用CLIPPING方法寻找峰值消除信号。-tone reservation for papr reduction of ofdm signals.

TR significantly reduces the PAPR when operating with an optimal PRT set however, the performance of TR degrades with nonoptimal PRT sets. Finding the optimal PRT set is a nondeterministic polynomial-time (NP)-hard problem [4], which cannot b