Modems White Papers
Long Range Channel Prediction for Adaptive OFDM Systems
Overview In this paper, different techniques for long-range channel prediction for OFDM systems are investigated. Frequency domain channel prediction on each OFDM subchannel is first explored, and it is shown that the optimum prediction filter depends only on the time-domain channel statistics under certain assumptions. Frequency domain prediction on the pilot tones is investigated next, where the predicted frequency response is determined by interpolation on the predicted pilots. Finally, time-domain channel prediction on the multipath taps is explored. It is shown through simulation that in high SNR regimes and short prediction horizons, prediction over all tones is superior to the other two methods. However, in medium to low SNR regimes and longer prediction horizons, time-domain prediction is superior.
| Publisher | The University of Texas at Austin | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | September 2004 | Downloads | 243 |
| Format | White Papers | ||
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