The document compares wavelet packet based MC-CDMA to conventional MC-CDMA. It proposes using wavelet packets instead of sinusoidal carriers for MC-CDMA. Wavelet packets have lower sidelobes, better time-frequency localization, and maintain orthogonality for overlapped signals. This improves performance by reducing interference and relaxing separation requirements between signals. Simulation results show the proposed wavelet packet based MC-CDMA outperforms conventional MC-CDMA, especially in combating fading channels.