Wavelet packet based OFDM

This paper is Bit error Rate (BER) comparison analysis of the FFT based Orthogonal Frequency Division Multiplexing (OFDM) and Wavelet Packet based OFDM. Nowadays, high bit rate, high capacity as demand for wireless communication systems to integrate in high speed data, video multimedia services as well as voice signals is consider. OFDM is multicarrier systems so efficient to high speed data transmission over multipath fading channel. In this paper comparison between conventional FFT based OFDM with DWPT based OFDM over AWGN and Rayleigh fading channel. Comparisons of OFDM different Modulation schemes conventional and non-conventional and with different family found that DWPT based OFDM db10 wavelet family better BER performance. To mitigate fading ISI and noise is minimized with channel equalizer used ZF, MMSE, technique used show with comparisons with Rayleigh channel. It concludes that channel equalizer technique is better BER improvement. The simulations results presented with MATLAB software.