A novel PAPR mitigation technique using modified PTS

Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high speed data transmission over multipath fading channels. OFDM modulation schemes offer many advantages for multicarrier transmission at high data rates over time dispersive channels, particularly in mobile applications. One of the main issues of OFDM is high Peak-to-Average Power Ratio (PAPR) of the transmitted signal which adversely affects the complexity of power amplifiers. In this paper, we have purposed a modified PTS scheme which requires very less no of phase vectors and also less no of bits to be transmitted for synchronization at receiver. We have carried out the results for modified scheme and ordinary OFDM system which shows a great reduction in PAPR of the signal.