Verification for PAPR Reduction of OFDM Signal Using Partial Transmit Sequences Technique

In this paper we propose an algorithm for PAPR reduction in OFDM systems, based on a Partial Transmit Sequence Technique. In this present work an introduction to multi-carrier modulation emphasizing OFDM (Orthogonal Frequency Division Multiplexing) is given followed by mathematical and qualitative description of OFDM. This paper work presents an overview of the most popular OFDM PAPR-reduction techniques demonstrating that Partial Transmit Sequences (PTS) Technique is a particularly promising reduction technique. It achieves considerable PAPR reduction without distortion, but the high computational complexity of multiple Fourier transforms is a problem in practical systems. This new technique significantly decreases the computational complexity while providing comparable PAPR reduction to ordinary PTS (OPTS), even with a small number of stages after PTS partitioning. All carriers are orthogonal to each other, which means when one particular subcarrier is at its peak other are at zero. It also requires less increase in SNR for the same BER compared to other methods. Numerical results are presented which confirm the PAPR improvements.