Analyse of BER performances of OFDM systems in terms of modulation type, length and type of guard intervals for different propagation conditions

OFDM transport technique due to spectral efficiency have found wide application in communication systems of 4th generation. In the first part of this paper, BER performances of OFMD communication systems were analysed in terms of QAM modulation type of subcarriers and for different type of transmission channels. In the second part of this work, it was done BER analyse of 256 QAM OFDM systems in terms of type and length of guard intervals and for multipath propagation channels. Simulations of OFDM systems were done in MATLAB.