On the wavelet OFDM performance in time variant channels: choosing the number of DWT iterations

Authors:
Marius Oltean
Affiliations:
Communications Department, Faculty of Electronics and Telecommunications, Timisoara, Romania
Venue:
DNCOCO'08 Proceedings of the 7th conference on Data networks, communications, computers
Year:
2008

Citing 2
Cited 0

Multi-Carrier Digital Communications: Theory and Applications of Ofdm

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Rayleigh fading channels in mobile digital communication systems. I. Characterization

IEEE Communications Magazine

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Abstract

The influence of the number of Discrete Wavelet Transform (DWT) iterations on a wavelet OFDM (WOFDM) system performance is studied in this paper. The WOFDM transmission is tested on a flat, time variant radio channel. Basically, the number of DWT iterations coincides with the number of transmission scales used. Our simulations show that by increasing the value of this parameter, the BER performance degrades. This result is explained by the fact that a small number of iterations keeps the duration of the transmitted symbols significantly shorter than the coherence time of the channel.