New hybrid of PTS-CAPPR methods with non-uniform phase factor and coded SI technique in OFDM systems

In this paper, we propose a new PAPR reduction by using hybrid of partial transmit sequences (PTS) and cascade adaptive peak power reduction (CAPPR) methods with non uniform phase factor and coded side information (SI) technique. These methods are used for reduce peak to average power ratio (PAPR) in an orthogonal frequency division multiplexing (OFDM) system. The hybrid of PTS-CAPPR methods when number of sub block increases, high efficiency of PAPR reduction can be obtained. However, a quite large calculation cost must be demanded and thus it is impossible to obtain the optimum. In the proposed method, we introduce non-uniform phase factor and coded SI technique. The total calculation cost and number bit of side information for recovering original data becomes drastically reduced. In simulation results, the proposed method demonstrated the improvement of PAPR and bit error rate (BER) performance.