A Novel Joint Scheme of PAPR Reduction and BER Performance Enhancement in Interleaved DCT-SCFDMA System

This paper is concerned with the performance improvement of peak-to-average power ratio (PAPR) reduction in interleaved mode of discrete cosine transform based single carrier frequency division multiple access (DCT-SCFDMA) using a combined technique of pulse shaping with a nonlinear companding process. This proposed scheme is based on the modified hyperbolic tangent transform which can compress the large signals and enlarge the small signals while keeping the average power invariant. Simulation results show that the proposed methodology markedly reduces the PAPR value and enhances the bit error rate (BER) performance.