On the DWT- and WPT-OFDM versus FFT-OFDM

We demonstrate simulation approaches for wavelet based OFDM, particularly in DWT and WPT-OFDM as alternative substitutions for Fourier based OFDM. We begin by constructing the models of the inverse and forward transforms, which can be flexible for substitutions in an OFDM system. We explain in detail each model and study the BER performance. The wavelet based OFDM (DWT-OFDM and WPT-OFDM) is assumed to have orthonormal bases properties and satisfy the perfect reconstruction property. We use different wavelet families and compare with conventional FFT-OFDM system. We found that the DWT-OFDM platform is superior as compared to others as it has less error rate, especially when it uses bior5.5 or rbior3.3 wavelet family.