| 摘要 |
A wireless communication device communicates orthogonal frequency division multiplexing (OFDM) signals comprised of orthogonal subcarriers within an available spectrum. In-band interference, noise and channel effects may be measured for the subcarrier frequencies and a modulation order is selected on a per subcarrier basis to compensate for channel effects and in-band interference. Accordingly, the subcarriers may be configured to operate at a maximum communication rate allowing the channel to approach its "water-filling capacity". In one embodiment, an access point may select modulation orders on a per subcarrier basis for upstream communications received from the wireless communication devices. In another embodiment, the wireless communication devices may select modulation orders on a per subcarrier basis for downstream communications received from the access point. Forward error correction (FEC) code rates and interleaving may be adjusted to the per subcarrier modulation selections.
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