A New Hybrid Precoding-Partial Transmit Sequence Method for PAPR Reduction in Multicarrier Wireless Communication Systems

Modern broadband and data communication systems strongly rely on the principles of orthogonal frequency division multiplexing (OFDM) for effective high speed data transfer between wireless systems and devices. But the underlying OFDM scheme has large peak to average power ratio (PAPR) value associated with it which can severely affect the overall system’s performance by degrading the bit error rate (BER) performance and increasing the out of band radiation. This article proposes a precoder-based partial transmit sequence (P-PTS) method in which the OFDM signal is precoded in order to reduce the out of band radiation and maintain the BER performance, while the PTS scheme is used to reduce the PAPR value. The effectiveness of P-PTS is validated for a 16 QAM modulated OFDM signal with 1024 subcarriers when transmitted over additive white Gaussian Noise (AWGN) channel and Rayleigh channel to the OFDM receiver section. The simulation analysis ensures that PAPR reduction is achieved by nearly 50% when compared to the original OFDM signal without degrading the BER performance.