A New Novel Improved Technique for PAPR Reduction in OFDM System

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) technology has become attractive method technology in the new generation of communication systems requiring high-speed data transmission. Big peak-to-average power ratio (PAPR) is the main problem of this modulation. By reducing the PAPR, but it will introduce noise and raise the bit error rate (BER). Partial transmit sequence (PTS) is another effective way to reduce PAPR. To solve these, a new joint technique, iterative partial transmit sequence (IPTS) and Clip method, is put forward. The simulation results show that the PAPR performance of this technique is better than that of single technology. Under the same conditions, compared with the PTS technique and the Clip algorithm, the threshold values of the IPTS Clip combined technique are optimized for 3.61dB and 1.09dB, respectively. Compared with PTS splicing technique and IPTS technique, the threshold value of IPTS Clip joint is optimized by 1.01dB and 4.09 dB, respectively. Compared with PTS and Clip algorithm, the threshold of PTS Clip is optimized to 2.60dB and 0.08dB. compared with the original signal, the threshold of IPTS Clip is 6.17dB. Theoretical analysis and simulation results show this method improves the performance and reduces the computational complexity.In addition, it also shows better PAPR performance degradation.