Adaptive sequence estimation for digital cellular radio channels

Details Adaptive sequence estimation for digital cellular radio channels Adaptive sequence estimation for digital cellular radio channels

1996-06-18

1999-01-19

DeCady, Albert

Excavating

375262, 375341, 704242, G06F 1110

Patent

active

058621563

ABSTRACT:
An equalizer/decoder for a communication channel presenting impairments to error-free reception of transmitted symbols includes a modified Viterbi decoder operating on samples of received signals in a plurality of equivalent subchannels. Estimates of each of the subchannels are updated using a locally best estimate in the Viterbi trellis processing, thereby avoiding delay in updating channel estimates in a rapidly changing channel such as a digital cellular communications channels. A leaky predictor channel updating technique also proves advantageous in an alternative embodiment.

REFERENCES:
patent: 4745625 (1988-05-01), Eyuboglu
patent: 4833693 (1989-05-01), Eyuboglu
patent: 4847871 (1989-07-01), Matsushita et al.
patent: 4862483 (1989-08-01), Clark
patent: 4905254 (1990-02-01), Bergmans
patent: 5005188 (1991-04-01), Clark
patent: 5031195 (1991-07-01), Cherillat et al.
patent: 5056117 (1991-10-01), Gitlin et al.
patent: 5081651 (1992-01-01), Kubo
patent: 5191598 (1993-03-01), Backstrom et al.
patent: 5195107 (1993-03-01), Wei
patent: 5257272 (1993-10-01), Frederickson
patent: 5263033 (1993-11-01), Seshardi
patent: 5263053 (1993-11-01), Wan et al.
patent: 5272727 (1993-12-01), Okanoue
Hariharan et al., "Adaptive Channel Estimator for an HF Radio Link", Sep. 1989, vol. 37, No. 9, IEEE Trans. on Communications, pp. 918-926.
Sheshadri, "Joint Data & Channel Estimation Using Fast Blind Trelus Search Techniques", 1990, pp. 1659-1663, IEEE.
Shino et al., Performance of an Adaptive Max. Likelihood Receiver for Fast Fading Multi-Path Channel, 1992 IEEE, pp. 380-383.
Cox et al., "Subband Speech Coding & Matched Convolutional Channel Coding for Mobile Radio Channels", 1991 IEEE, pp. 1717-1731.
A. J. Viterbi and J. K. Omura, Principles of Digital Communications and Coding, McGraw-Hill, New York, 1979.
J. G. Proakis, Digital Communications, McGraw-Hill, New York, 1989.
S. U. H. Qureshi, "Adaptive Equalization," Proceedings of the IEEE, vol. 73, pp. 1349-1387, Sep., 1985.
A. Duel-Hallen and C. Heegard, "Delayed Decision-Feedback Sequence Estimation," IEEE Transactions on Communications, vol. COM-37, pp. 428-436, May, 1989.
S. Benedetto, E. B. Biglieri and V. Castellani, "Digital Transmission Theory," Prentice Hall, Englewood Cliffs, 1987, Chapter 7.

Affiliated with

Also associated with

Rating

Adaptive sequence estimation for digital cellular radio channels 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 sequence estimation for digital cellular radio channels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive sequence estimation for digital cellular radio channels will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1252561