Abstract
Orthogonal wavelets enclose more potential of dropping the ISI- and ICI- sway amid the carriers due to multipath propagation over the free-space fading channels. Moreover, wavelet-OFDM is more bandwidth efficient as compare to conventional OFDM and is less affected by Doppler shift. Accordingly, a BER estimation of Discrete Fourier Transform (DFT) based OFDM system and Discrete Wavelet Transform (DWT) based OFDM system is carried out in this work. The appraisal is demonstrated by means of diverse modulation schemes explicitly BPSK, QPSK, 8-PSK and QAM for both conventional-and wavelet-OFDM wireless system over Rayleigh, Rican and free-space fading channels. Higher orders of PSK schemes involve more SNR requirement to target an acceptable BER over the simulated channels.
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