Performance comparison between DWT-OFDM and FFT-OFDM using time domain zero forcing equalization

Recent research on the performance of multicarrier systems suggest that the us e of wavelet transforms (WT) outperforms the conventional fast Fourier transform (FFT) orthogonal frequency division multiplexing (OFDM) systems. Wavelets based systems provide better spectral efficiency because of no cyclic prefix requirement, have very narrow side lobes and also exhibit improved BER performance. Meanwhile, channel estimation in wavelet based multicarrier systems still remains a big challenge. In this work an investigation into the performance of discrete wavelet transform based multicarrier system using zero forcing equalization in time domain is presented. The results produced were then compared to that of conventional FFT-based OFDM system. The proposed system shows superior BER performance.