The contradiction between channel estimation and PAPR performance in cyclic shift PTS

Partial transmit sequence (PTS) scheme is one of the most popular peak-to-average power ratio (PAPR) reduction schemes for orthogonal frequency division multiplexing (OFDM) systems. In term of PAPR performance, the cyclic shift on time-domain PTS is better than conventional PTS (C-PTS), and the receiver can detect the phase rotations without using side information (SI). But, In order to detect the phase rotation factors the receiver must obtain channel response before detecting. In this paper, we discuss the contradiction between channel estimation and PAPR performance in cyclic shift PTS method. Simulation shows that it is difficult to have both good PAPR and bit error rate (BER) performance while using pilots to estimate channel response in cyclic shift PTS method.