عباسعلی شریفی

Orthogonal frequency division multiplexing (OFDM) is a multicarrier modulation technique for high-speed data transmission in wireless communications. In an OFDM system, a large number of subcarriers are used to transmit the modulated symbols and consequently, the OFDM signals have a high peak-to-average power ratio (PAPR). To reduce the high PAPR, we propose a partial transmit sequence (PTS) method based on the adaptive particle swarm optimization. Also, the proposed method effi ciently search the optimal combination of phase rotation factors to decrease the computational complexity. Experimental results show that the proposed method signifi cantly has reduced the PAPR and computational complexity.