Reducing PAPR in OFDM Systems Using a PTS Based Low Computational Complex Algorithm
Orthogonal Frequency Division Multiplexing (OFDM) has proven to be the most promising technique for high speed data transmission over a dispersive channel. It is because of its several advantages such as high spectral efficiency, low implementation complexity, less vulnerability to echoes and non - linear distortion. However, it has few limitations such as Peak-to-Average-Power Ratio (PAPR) and Bit Error Rate (BER), which determines the system's power efficiency. This paper addresses the problem of reducing PAPR in OFDM systems. For this purpose, Partial Transmit Sequence (PTS) is chosen, which has proven to be a promising technique for PAPR reduction in OFDM systems. However in this approach, computation of optimal PTS weight factors via exhaustive search requires exponential complexity in the number of sub-blocks.