Comparative Study between Various PAPR Reduction Technique

Abstract

This paper presents the comparative study between various PAPR reduction technique such as partial transmit sequence, DFT spreading, Clipping and filtering. The peak to average power ratio of the time domain envelope is an important parameter at the physical layer of the communication system using OFDM signaling. The signals must maintain a specified average energy level in the channel to obtain the desired Bit-errorrate. The peak signal level relative to that average defines the maximum dynamic range that must be accommodated by the components in the signal flow path to support the desired average. High Peak to Average Power Ratio (PAPR) for OFDM system is still a demanding area and difficult issue. The radio transmitter stations for covering and getting enough transmitted power in their desired area has to use High Power Amplifier (HPA). If the high power amplifier doesn’t work in linear region, it can cause the out-of-band power to be kept under the specified limits. This condition can cause inefficient amplification and expensive transmitters, thus it is necessary to investigate PAPR reduction techniques for OFDM system. Some of the performance measures like Complementary Commutative Distribution Function of PAPR and BER are analyzed through simulation to demonstrate the efficacy of the various scheme.