Multichannel adaptive equaliser

Details Multichannel adaptive equaliser Multichannel adaptive equaliser

2007-07-31

2007-07-31

Tse, Young T. (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S234000, C708S319000, C708S320000

Reexamination Certificate

active

10148142

ABSTRACT:
An equalizer device is used for digital communications systems having a plurality of receive channels. The equalizer device in normal operation comprises a transversal filter for each receive channel, an adder for summing the receive channels, and a system downstream from the adder including a phase corrector and a recursive portion including a single recursive filter and decision circuit in its forward branch. The equalizer device including decision-taking circuit for evaluating its performance as a function of the output signal from the equalizer device and for responding to the result of this evaluation by switching from a first structure which corresponds to a normal mode of operation to a second structure which corresponds to a convergence mode of operation, and vice versa.

REFERENCES:
patent: 4696015 (1987-09-01), Palicot et al.
patent: 5335251 (1994-08-01), Onishi et al.
patent: 5513214 (1996-04-01), Gozzo
patent: 5909466 (1999-06-01), Labat et al.
patent: 6314147 (2001-11-01), Liang et al.
patent: 2004/0264610 (2004-12-01), Marro et al.
patent: 0725497 (1996-08-01), None
patent: 2738967 (1997-03-01), None
Albonico, D. et al., “Test of high data rate acoustic link in shallow water”, IEEE Oceanic Engineering Society. Oceans '98. pp. 1028-1032, vol. 2.
Labat J., et al. “Adaptive Decision Feedback Equalization: Can You Skip the Training Period?”, IEEE Transactions on Communications, pp. 921-930, vol. 46, No. 7, Jul. 1, 1998.
Labat J., et al. “Blind decision Feedback equalization application to underwater communication systems”, IEEE Oceanic Engineering Society, Oceans '98, pp. 805-809, vol. 2.
Labat J. et al., “Is Training of Adaptive Equalizers still Useful?”, IEEE Vehicular Technology Conference, Nov. 18, 1996, pp. 968-972.
Mottier D., et al, “Self-Adaptive Decision Feedback Equalization: Application to High-Order QAM Signals”, Proceedings of ICC'97, pp. 1100-1104, vol. 2.
Despins, C.L.B., et al., “Compound Strategies of Coding, Equalization, and Space Diversity for Wide-Band TDMA Indoor Wireless Channels”, IEEE Transactions on Vehicular Technology, pp. 369-370, Nov. 1, 1992.
Nagayasu, T. et al, “Performance of 16QAM With Decision Feedback Equalizer Using INterpolation for Land Mobile Communications”, pp. 384-387, May 10, 1992.
1999 IEEE, “Blind Spatio-Temporal Decision Feedback Equalization a Self-Adaptive Approach”, J. Labat, et al., pp. 2301-2305.
“Automatic Equalization for Digital Communication,” by R.W. Lucky;The Bell System Technical Journal, vol. XLIV, Apr. 1965, No. 4, pp. 547-589.
“Decision Feedback Equalization,” by Carlos A. Belfiore, et al.;Proceedings of the IEEE, vol. 67, No. 8, Aug. 1979, pp. 1143-1156.
“Maximum-Likelihood Sequence Estimation of Digital Sequences in the Presence of Intersymbol Interference,” by G. David Forney, Jr.;IEEE Transactions on Information Theory, vol. IT-18, No. 3, May 1972, pp. 363-378.
“The Viterbi Algorithm,” by G. David Forney, Jr.;Proceedings of the IEEE, vol. 61, No. 3, Mar. 1973, pp. 268-278.
“A Method of Self-Recovering Equalization for Multilevel Amplitude-Modulation for Multilevel Amplitude-Modulation Systems,” by Yoichi Sato;IEEE Transactions on Communications, Jun. 1975, pp. 679-682.
“Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems,” by Dominique N. Godard;IEEE Transactions on Communications, vol. COM-28, No. 11, Nov. 1980, pp. 1867-1875.
“Blind Equalizers,” by Albert Benveniste, et al.;IEEE Transactions on Communications, vol. COM-32, No. 8, Aug. 1984, pp. 871-883.
“New Criteria for Blind Deconvolution of Nonminimum Phase Systems (Channels),” by Ofir Shalvi, et al.;IEEE Transactions on Information Theory, vol. 36, No. 2, Mar. 1990, pp. 312-321.
“An Adaptive Nonlinear IIR Filter For Self-Learning Equalization,” by Carlos Aurelio Faria Da Rocha;1994 IEEE, pp. 6-10.
“Blind Equalization of Digital Communicaiton Channels Using High-Order Moments,” by Boaz Porat, et al.; 1991IEEE, pp. 522-527.
“New Class of Zero-Forcing Cost Functions in Blind Equalization,” by Victor Shtrom, et al.;IEEE Transactions on Signal Processing, vol. 46, No. 10, Oct. 1998, pp. 2674-2683.
“Adaptive Decision Feedback Equalization: Can You Skip the Training Period?” by Joel Labat, et al.;IEEE Transactions on Communications, vol. 46, No. 7, Jul. 1998, pp. 921-930.

Affiliated with

Also associated with

Rating

Multichannel adaptive equaliser does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3734543