Adaptive equalizer

Details Adaptive equalizer Adaptive equalizer

2006-02-28

2006-02-28

Ghebretinsae, Temesghen (Department: 2637)

Pulse or digital communications

Equalizers

Automatic

C708S323000

Reexamination Certificate

active

07006564

ABSTRACT:
An adaptive equalizer processes an input signal that includes noise, pre-cursor intersymbol interference, and post-cursor intersymbol interference. The adaptive equalizer includes a feedforward filter which reduces the pre-cursor intersymbol interference and whitens the noise, a feedback filter which detects the post-cursor intersymbol interference in a signal that corresponds to the input signal, and circuitry which removes the detected post-cursor intersymbol interference from the input signal. The feedforward filter includes separate first and second coefficients. The first coefficients reduce the pre-cursor intersymbol interference and the second coefficients whiten the noise.

REFERENCES:
patent: 4905254 (1990-02-01), Bergmans
patent: 5031195 (1991-07-01), Chevillat et al.
patent: 5150379 (1992-09-01), Baugh et al.
patent: 5436929 (1995-07-01), Kawas Kaleh
patent: 6011814 (2000-01-01), Martinez et al.
patent: 6012161 (2000-01-01), Ariyavisitakul et al.
patent: 6118814 (2000-09-01), Friedman
patent: 6167082 (2000-12-01), Ling et al.
patent: 6289046 (2001-09-01), Takeuchi et al.
patent: 6414990 (2002-07-01), Jonsson et al.
patent: 6490327 (2002-12-01), Shah
Adaptive equalization; Qureshi, S.; Communications Magazine, IEEE vol. 20, Issue 2, Mar. 1982 Pages(s):9-16.
Edward A. Lee and David G. Messerschmitt, Digital Communication: Chapter 9: Adaptive Equalization, 1988, pp. 371-406, Kluwer Academic Publishers, Boston, MA, USA.
John G. Proakis, Digital Communications: Chapter 11: Adaptive Equalization, 1995, pp. 636-679, McGraw-Hill, Inc.
Bernard Widrow and Samuel D. Stearns, Adaptive Signal Processing: Chapter 12: Adaptive Interference Canceling, 1999, pp. 302-367, Prentice-Hall, Inc. USA.
Shahid U.H. Qureshi, “Adaptive Equalization”, Proceedings of the IEEE, Sep. 1985, pp. 1349-1387, vol. 73, No. 9, USA.

Affiliated with

Also associated with

Rating

Adaptive equalizer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adaptive equalizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive equalizer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3695869