RS Turbo Coding for PAPR Reduction in Multiuser OFDM System

High peak-to-average power ratio (PAPR) of the transmit signal is a major drawback of multicarrier (MC) transmission such as orthogonal frequency division multiplexing (OFDM) system. This paper presents a novel Reed-Solomon (RS) codes based MC transmission scheme for reduction of PAPR called RS Turbo coded OFDM system. The reduction of PAPR of OFDM signal is obtained through a proper selection of RS turbo coding scheme that distributes the power of each modulated symbol over the OFDM block. The obtained results show that RS turbo coding scheme is an attractive solution to a PAPR problem of OFDM signals. The good improvement in PAPR given by present technique permits the reduction of complexity and cost of transmitter significantly and improved the performance of OFDM system. Finally, the performance of the RS turbo OFDM system is further evaluated by simulations showing the performance gain of the RS-OFDM system compared to a traditional uncoded OFDM.