BER Analysis of OFDM Receiver Using MMSE Channel Estimation Method with PTS for Different Subblocks

Abstract

Abstract-Orthogonal frequency division multiplexing (OFDM) is widely used multi-carrier modulation technique in wireless networks because of its superiority. Partial Transmit Sequence (PTS) is one of the many methods of PAPR reduction technique that have been proposed to address the PAPR issue in OFDM systems. But PTS suffers from high computational complexity which increases exponentially with increase in the number of subblocks. Modified PTS technique has reduced this computational complexity by using neighborhood search algorithm to find the optimum set of phase factors to reduce the PAPR of the OFDM signal. In this work, MMSE channel estimation algorithm is used to evaluate the performance of the OFDM receiver using PTS as the PAPR reduction technique. The receiver performance is analyzed in terms of BER for different number of subblocks. Simulation results show that BER increases with PAPR reduction.Index Terms-Bit error rate (BER), minimum mean square error (MMSE) channel estimation, peak-to-average power ratio (PAPR), partial transmit sequence (PTS).