Simultaneous analog and digital communication using fractional rate encoding
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United States of America Patent
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Jan 12, 1999
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N/A
app pub date -
Sep 2, 1997
filing date -
Jun 14, 1993
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Abstract
Digital data is encoded using a modulus m converter to produce fractionally encoded words, where m is the nearest integer larger than 2.sup.c and c is a noninteger. The fractionally encoded words are mapped into a symbol constellation having m symbols to produce a two dimensional data signal. The data signal is added to a two dimensional analog signal, which was obtained by encoding an input analog signal, to produce a combined two dimensional signal. The combined signal is modulated using QAM and then transmitted over a communication channel.
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