Adaptive equalizer and receiver

Details Adaptive equalizer and receiver Adaptive equalizer and receiver

1992-12-29

1995-12-12

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

375231, 375233, 375365, 375344, 333 18, 36472419, 3647242, 381103, H03H 730, H03H 740, H04L 700, H04L 2706

Patent

active

054757100

ABSTRACT:
A receiver capable of effecting frame synchronization control even at the time of initial acquisition and hand off in the presence of frequency selective fading. The receiver is provided in a demodulator part thereof with a quasi-coherent detector (140), a memory (144) for temporarily storing the output of the quasi-coherent detector, a write address counter (145) for the memory, an incoherent correlator (146) that determines correlation between a received data pattern and a known UW data pattern, a UW tentative detection circuit (147) that is supplied with the output of the address counter and the output of the incoherent correlator, an adaptive equalizer (148) that equalizes the received data stored in the memory by using the output of the UW tentative detection circuit, a UW detector (103) that effects UW position detection on the basis of the equalized data, and a frame synchronization control circuit (150) that effects frame synchronization control on the basis of the output of the UW tentative detection circuit and the output of the UW detector.

REFERENCES:
patent: 3648171 (1972-03-01), Hirsch
patent: 3715670 (1973-02-01), Hirsch et al.
patent: 4567599 (1986-01-01), Mizoguchi
patent: 4599732 (1986-07-01), LeFever
patent: 4811360 (1989-03-01), Potter
patent: 4829543 (1989-05-01), Borth et al.
patent: 4847869 (1989-07-01), Labedz et al.
patent: 4852090 (1989-07-01), Borth
patent: 4890298 (1989-12-01), Galpin
patent: 4891698 (1990-01-01), Mattausch et al.
patent: 4893184 (1990-01-01), Mattausch et al.
patent: 4947409 (1990-08-01), Raith et al.
patent: 4985902 (1991-01-01), Gurcan
patent: 5050186 (1991-09-01), Gurcan et al.
patent: 5068873 (1991-11-01), Murakami
patent: 5121414 (1992-06-01), Levine et al.
patent: 5150380 (1992-09-01), Okanoue
patent: 5164962 (1992-11-01), Nakai et al.
patent: 5175746 (1992-12-01), Inoue et al.
patent: 5175747 (1992-12-01), Murakami
patent: 5199047 (1993-03-01), Koch
patent: 5214671 (1993-05-01), Nakai
patent: 5276706 (1994-01-01), Critchlow
Lars Svensson, "Channel Equalizer for a Digital Mobile Telephone Using Narrow-Band TDMA Transmission," 39th IEEE Vehicular Technology Conf., vol. I, pp. 55-58 (May 1-3, 1989).
Bjorn Gudmundson, "Adaptive Decision Feedback Equalizers to Combat Time Dispersion on the Mobile Radio Channel," Eurocon 88, 8th European Conf. on Electronics, pp. 106-109 (Nov. 14, 1988).
M. S. Mueller, "Least-Squares Algorithms for Adaptive Equalizers," The Bell System Technical Journal, Oct. 1981, pp. 1905-1925, (Manuscript received Mar. 17, 1981).
Wen-Hsiung Chen, and William K. Pratt, "Scene Adaptive Coder," IEEE Transactions on Communications, vol. Com-32, No. 3, Mar. 1984, pp. 225-232.
Ronald Plompen et al., "Motion Video Coding in CCITT SG XV--The Video Source Coding," pp. 0997-1004, IEEE, 1988.
Ueda & Suzuki "Performance of Equalizers Employing a Re-Training RLS Algorithm for Digital Mobile Radio Communications".
Nakai, et al "Adaptive Equalizer for Digital Cellular Radio".
K. Murakami, et al "Design of an Adaptive Kalman Equalizer and its Performance Over Fading Multipath Channels", May, 1990.
M. Nakajima, et al "Performance of a Decision Feedback Equalizer Under Frequency-Selective fading in Land Mobile Communications" Electronics & Communications in Japan, Nov. 1990.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1366612