A comparison of Different Peak to Average Power Ratio Reduction Techniques in Long Term Evaluation Downlink

The main drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems is the high peak-to-average power ratio (PAPR), which leads to a significant reduction in power efficiency. In this research discusses different PAPR Reduction techniques in OFDM. Techniques like clipping, Selective Mapping (SLM), Partial Transmit Sequence (PTS) based different modulation and different channel. Clipping technique is simple, SLM reduction technique; generation of phase sequence is very random and has to be sent to receiver before the actual communication. Selection of proper phase sequence to achieve good PAPR reduction is very important; the PTS technique is that an input symbol is partitioned into number of disjoint symbol. Through the Analysis, it is shown that Clipping on AWGN channel and QPSK modulation is better than other techniques.