Device and method for precoding

Details Device and method for precoding Device and method for precoding

1993-07-08

1995-08-29

Coles, Sr., Edward L.

Pulse or digital communications

Systems using alternating or pulsating current

375265, 375340, 371 43, H04B 110, H04L 512, H04L 2700, G06F 1110

Patent

active

054467586

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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