Device and method for precoding
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United States of America Patent
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Aug 29, 1995
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N/A
app pub date -
Jul 8, 1993
filing date -
Jul 8, 1993
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Abstract
An improved precoding technique (700) and device (100) allows transmission of a signal point sequence over a channel h(D) to provide efficient data transfer in the presence of intersymbol interference and noise at data rates approaching channel capacity. This improved technique works with trellis-coded modulation and with any signal constellation. Thus, the present invention simplifies shaping and allows signaling at fractional rates without constellation switching. A key advantage of the present invention over prior art is its ability to achieve reduced dither loss by selecting the output components of a mapper based on past components of a channel output sequence.
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