PAPR Reduction for OFDM Scheme by New Partial Transmit Sequence Technique in Wireless Communication Systems

The high peak-to-average power ratio (PAPR) of the transmit signal is considered to be one of the major drawback of OFDM (orthogonal frequency division multiplexing) systems. The peak transmitted power can be substantially larger than that of a single carrier system. PTS (partial transmit sequence) can improve the peak-to-average power ratio (PAPR) statistics of an OFDM signal. In this paper, we have proposed a new partial transmit sequence (NPTS) approach which is a new algorithm for computing the best phase factors for PTS. This algorithm is compared with optimal binary phase sequence (OBPS). Simulation result shows that NPTS performs better than OBPS, but the reach complexity increases exponentially with number of sub blocks. We also investigate the effect of non-linear amplifiers on the performance of the new algorithm.