i have heard that DWT is good than FFt for so many reasons....
FFT only gives frequecny resolution but no time resolution however wavelet transform gives both the frequency and time resolution.
In case of OFDM spectral efficiency increases if DWT is used than FFT . thats why..but can u ppl share much about it
Added after 2 minutes:
hey dear fren DWT that i m referring to is Discrete Wavelet Transform ....
DWT is far better than the fourier transform. isn't it??