Method and apparatus for constructing a sub-carrier map
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United States of America Patent
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Issued Date -
Feb 27, 2003
app pub date -
Aug 21, 2001
filing date -
Aug 21, 2001
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Abandoned
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Abstract
A method and apparatus for selecting a modulation type and forward error correction (FEC) configuration and a sub-carrier map to maximize data throughput in a multi-carrier orthogonal frequency division multiplexing (OFDM) system for use in an inherently noisy network, such as power line distribution networks. A sub-carrier map or is constructed by selecting a sub-set of available sub-carriers using estimated sub-carrier SNR values and two predefined criteria, a SNR threshold and a useful sub-carrier ratio. The invention leverages the error correction capacity of FEC to maximize data throughput.
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