PAPR REDUCTION IN OFDM SYSTEMS USING ADAPTIVE ACTIVE CONSTELLATION EXTENSION ALGORITHM

OFDM Signal combines the multiple symbol representations method with a signal clipping method using a new hybrid PAPR reduction technique. The amplitude of the signal is limited to the threshold value using clipping method which considering the signal must be interpolated before A/D conversion and also different filtering technique has been proposed. The clipping technique has the subcarriers highest phase difference between the original signal and its clipped variant will be changed. Linear methods like partial transmit sequence (PTS) or selective mapping (SLM) has been proposed for the reduction of PAPR as well. The simulation results have done MATLAB and also advantages of the proposed PAPR reduction method.