Bit Error Rate Performance of TFT-OFDM Over Different Channels

Various wireless communication applications use Orthogonal Frequency Division Multiplexing (OFDM) as modulation and multiplexing technique due to its high Spectral Efficiency (SE). Due to the growing need for wireless capacity such as more users and applications, spectral efficiency should be improved. The signal which is transmitted over wireless channel subject to various loss such as interference, and fading path loss. The demand for high capacity with higher quality of service is increased. In this case, OFDM is a better option to overcome the problem of capacity. The OFDM is having high bandwidth transmission of data. TFT-OFDM has training information both in time and frequency domain. TFT-OFDM utilizes time-domain training sequence without interference cancellation to obtain path delay information of the channel, whereas the path coefficients are obtained by using frequency-domain grouped pilots. The simulation is carried out in terms of BER performance of TFT-OFDM over different channels such as AWGN, Brazil D and Vehicular B channel. Result shows that as the signal to noise ratio increases the bit error rate performance of TFT-OFDM system improves.