Modified PTS for PAPR Reduction in Pilot-Assisted Ofdm: Generating New Phase Weighting Factors from the Paley-I Type Hadamard Matrices

High Peak to Average Power Ratio (PAPR) is still a most important challenge in Orthogonal Frequency Division Multiplexing (OFDM) system. This paper proposes a modified Partial Transmit Sequence (PTS) technique which acquires its phase weighting factors from the Paley-I type Hadamard matrices with an objective to reduce the high PAPR in OFDM systems. The proposed technique achieves better PAPR reduction than traditional PTS-OFDM and it also obviate the need for exhaustive search for the viable phase weighting factors in PTS-OFDM, thereby reducing the computational overhead and also avoids the unwanted data rate loss.