A Study of the Multi-Scale WOFDM Transmission in Time Variant Channels
Source: NORTH ATLANTIC UNIVERSITY UNION
WOFDM (Wavelet-based Orthogonal Frequency Division Multiplexing) reshapes the multi-carrier transmission concept, by using wavelet carriers instead of OFDM's complex exponentials. The modulator and the demodulator rely on the Discrete Wavelet Transform (DWT) computation. One crucial parameter of this transform is the number of iterations, tightly related to the time-scale nature of the wavelet transform. Practically, the number of DWT iterations coincides with the number of transmission scales used. The influence of this parameter on the WOFDM transmission performance is studied in this paper. The considered scenario refers to a flat, time variant Rayleigh fading channel.