Performance evaluation of FFT-WiMAX against WHT-WiMAX over Rayleigh fading channel

Wavelets comprise the ability to increase bandwidth efficiency in addition to higher resiliency to inter-symbol interference (ISI) and inter-carrier interference (ICI). Wavelets are introduced into the wireless communication field as an orthogonal base of multi-carrier modulation and are considered as an efficient and effective measure. Fittingly, a BER and spectral efficiency estimation of discrete Fourier transform (DFT) based WiMAX structure and discrete wavelet transform (DWT) based WiMAX structure is done in this work. The evaluation is validated over Rayleigh channel using divergent digital modulation levels along with diverse convolution code (CC) rate proposed for FFT-WiMAX and WHT-WiMAX. The performance of the simulated structure is investigated via BER and spectral efficiency assessment as a function of SNR. The imitation outcome reports a significant improvement in BER and spectral efficiency for a given SNR of the simulated system using WHT-WiMAX in comparison to FFT-WiMAX.