A Modified Clipping Scheme for PAPR Reduction of OFDM-QAM Signals Based on Quantization Method

摘要

In recent years, Orthogonal Frequency Division Multiplexing (OFDM) has received widespread attention for high-data rate transmission. One drawback of OFDM is the high Peak-to-average Power Ratio (PAPR). A novel scheme referred to as Quantization Clipping (QC) is proposed to solve the high PAPR problem in OFDM-QAM system. For the QC scheme, we preset several different clipping thresholds, and then quantize the input signal to a group of preset thresholds. Simulation results show that the new scheme can significantly improve the BER performance while guaranteeing the improvement in the PAPR performance of the OFDM-QAM system.