Institute of Research in Engineering and Technology (IRET)
Orthogonal Frequency Division Multiplexing (OFDM) is a form of multicarrier modulation technique. In this system, orthogonally placed subcarriers are used to carry the data from transmitter end to receiver end and have found its way to the high speed wireless and mobile communication world. It has excellent immunity against fading and ISI but its major drawback is Peak-to-Average Power Reduction (PAPR) of the transmitted signal. So many methods are proposed to reduce large PAPR. But most of the techniques are complex. In this paper, various optimization techniques GA, PSO and hybrid algorithms are proposed to optimize phase factors in PTS technique of OFDM system.