Method and apparatus for improved high-speed adaptive...

Details Method and apparatus for improved high-speed adaptive... Method and apparatus for improved high-speed adaptive...

2007-11-27

2007-11-27

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C333S018000, C708S323000

Reexamination Certificate

active

09955278

ABSTRACT:
A method and apparatus for improved high-speed adaptive equalization that may operate effectively even in systems experiencing severe interference by using one or more error generators and taking multiple samples across a bit interval. Advantageously, a preferred embodiment of the current invention may be deployed in a clockless configuration. Preferably, one or more controllable analog filters may be controlled by one or more microprocessors used to assess the error data from the error generators and to calculate the appropriate coefficients for the filters according to one or more error minimization algorithms. Preferably, the steps of sampling, assessment, calculation and coefficient setting may be done iteratively to converge to an optimum set of filter values and/or respond dynamically to signals with time-varying noise and interference characteristics.

REFERENCES:
patent: 3845390 (1974-10-01), De Jager et al.
patent: 5434883 (1995-07-01), Kimoto et al.
patent: 5768313 (1998-06-01), Kuribayashi
patent: 5864545 (1999-01-01), Gonikberg et al.
patent: 5880645 (1999-03-01), Everitt et al.
patent: 6038266 (2000-03-01), Lee et al.
patent: 6088415 (2000-07-01), Gaudet
patent: 6167082 (2000-12-01), Ling et al.
patent: 6363111 (2002-03-01), Hee et al.
patent: 6437932 (2002-08-01), Prater et al.
patent: 6563889 (2003-05-01), Shih et al.
patent: 6665337 (2003-12-01), Girardeau et al.
patent: 6798827 (2004-09-01), Phanse
patent: 6823028 (2004-11-01), Phanse
patent: 6922407 (2005-07-01), Wu
patent: 6967988 (2005-11-01), Wedding
patent: 2002/0034222 (2002-03-01), Buchwald et al.
patent: 2003/0081670 (2003-05-01), Bologna et al.
Efficient least squares adaptive algorithms for FIR transversal filtering; Glentis, G.-O., etal; □□Signal Processing Magazine, IEEE , vol. 16 , Issue: 4 , Jul. 1999; pp.13-41.
Fast adaptive algorithms for multichannel filtering and system identification; Glentis, G.-O.A., et al; □□Signal Processing, IEEE Transactions on , vol. 40 Issue 10 , Oct. 1992 pp. 2433-2458.
Proceedings of the IEEE vol. 73 Issue: 9 Date: Sep. 1985 Adaptive equalization; Qureshi, S.U.H.; pp. 1349-1387.
A low-power 128-tap digital adaptive equalizer for broadband modems; Nicol, C.J. et al; Solid-State Circuits, IEEE Journal of vol. 32, Issue 11, Nov. 1997 pp. 1777-1789.
On the admissibility of blind adaptive equalizers Ding, Z.; Johnson, C.R., Jr.; Kennedy, R.A.; Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on Apr. 3-6, 1990 pp. 1707-1710 vol. 3.
Convergence analysis of self-adaptive equalizers Macchi, O.; Eweda, E.; Information Theory, IEEE Transactions on vol. 30, Issue 2, Mar. 1984 pp. 161-176.
Nonlinear Equalization of Binary Signals in Gaussian Noise Ungerboeck, G.; Communications, IEEE Transactions on [legacy, pre—1988] vol. 19, Issue 6, Part 1, Dec. 1971 pp. 1128-1137.
Embedded fuzzy control for automatic channel equalization after digital transmissions Dualible, C.et al; Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on vol. 3, May 6-9, 2001 pp. 173-176 vol. 2.
Dominique N. Godard; “Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems”; IEEE Nov. 1980; pp. 1867-1875.
Voorman, Snijder, Vromans, and Barth, “An Automatic Equalizer for Echo Reduction in TeleText on a Single Chip,”Philips Technical Review, vol. 40, No. 11/12, 1982 (p. 319-328).
Borjak, Monteiro, O'Reilly, and Darwazeh, “High-Speed Generalized Distributed-Amplifier-Based Transversal-Filter Topology for Optical Communications Systems,”IEEE Transactions on Microwave Theory and Techniques, vol. 45, No. 8, Aug. 1997, (p. 1453-1457).
Kaminow, Koch “Optical Fiber Telecommunications IIIA,” Academic Press 1997, (p. 114-161, cover pages and contents pages 8 pgs).

Affiliated with

Also associated with

Rating

Method and apparatus for improved high-speed adaptive... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for improved high-speed adaptive..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for improved high-speed adaptive... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3819120