Communication system with multicarrier telephony transport
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United States of America Patent
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Jan 21, 2003
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N/A
app pub date -
Sep 16, 1999
filing date -
May 20, 1996
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Abstract
A communication system for transferring digital data over a distribution network is described. The communication system includes an interface for receiving successive strings of digital data from a source, each string representing a certain number of bits. The system also includes a symbol mapper for converting the strings into a sequence of symbols representing a constellation of discrete values of the amplitude and phase of a carrier for a predetermined period. The constellation is rotationally asymmetric for valid ones of the data strings. The system further includes a modulator for synthesizing a plurality of orthogonal carriers from said symbols a transmitter for sending the modulated carriers over a distribution network.
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