Reduction of PAPR and BER by Using Golay Sequences for OFDM System
PAPR (Peak to Average Power Ratio) is the major drawback in multicarrier systems. In this paper, the authors proposing a low complexity Golay sequence coder followed by special Fractional Fourier Transform (FRFT) block to reduce the PAPR. The input data encoder which provides low order Golay sequences coded modulation is transmitted through FRFT block and it is designed to provide optimal de-correlation between signal and noise. This provides low complexity, low BER (Bit Error Rate) and PAPR reduction for previous existing schemes and also observes the BER and PAPR results by considering different modulation techniques (i.e., 16-QAM and 64-QAM).