Pulse or digital communications – Repeaters – Testing
Patent
1992-01-13
1994-03-01
Kuntz, Curtis
Pulse or digital communications
Repeaters
Testing
375 58, 375 60, 375 99, H04B 110
Patent
active
052915204
ABSTRACT:
A transmitter is provided with a distribution preserving Tomlinson coder which predistorts shaped data signals such that the power of each data signal exiting the coder is substantially similar to the power of the data signal entering the coder and such that upon transmission of the predistorted data signal over a channel, the effect of ISI of the channel is substantially removed. The transmitter is primarily intended for coded modulation systems utilizing a "coset" code, and the predistortion is preferably accomplished according to a linear function ##EQU1## where r.sub.k is a data signal entering the coder, a and.sub.i b.sub.i are the coefficients of polynomials relating to the channel impulse response, x.sub.k is the predistorted data signal exiting the coder, and s.sub.k is chosen to cause the signal power of x.sub.k on average to approximately equal the signal power of r.sub.k on average. Different methods for so choosing s.sub.k are disclosed. Receivers which cooperate with the provided transmitters are also provided.
REFERENCES:
patent: 5107520 (1992-04-01), Karam et al.
"A simple and effective precoding scheme for noise whitening on intersymbol interference channels" by Rajiv Laroia et al. IEEE Jan. 2, 1992 pp. 1-6.
General Datacomm, Inc.
Ghebretinsae T.
Gordon David P.
Kuntz Curtis
LandOfFree
Methods and apparatus employing distribution preserving Tomlinso does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus employing distribution preserving Tomlinso, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus employing distribution preserving Tomlinso will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-584800