Estimator having a feedback loop

Details Estimator having a feedback loop Estimator having a feedback loop

1997-06-30

2000-03-07

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375229, 375346, 375348, 370286, H03D 100, H04L 2706

Patent

active

060350067

ABSTRACT:
A signal estimation loop includes a postcursor estimator which generates all possible postcursor estimation signals in a first past symbol period which is one symbol earlier based on a past estimated signal in a second past symbol period which is at least two symbols earlier. One of the possible postcursor estimation signals is selected based on the estimated signal to output a postcursor estimation signal to a subtracter in the symbol period. The subtracter subtracts the postcursor estimation signal from an input signal to produce a difference signal which is used to generate the estimated signal.

REFERENCES:
patent: 4878232 (1989-10-01), Fisher
patent: 5594756 (1997-01-01), Sakurai et al.
patent: 5748677 (1998-05-01), Kummar
Alexandra Duel-Hallen, et al., "Delayed Decision-Feedback Sequence Estimation", IEEE Transactions on Communications, vol. 37, No. 5, May 1989, pp. 428-436.
Hitoshi Matsui, "Hisenkeiwai Tokayou Tekio Bitabi Tokaki" [Viterbi Equalizer Applied for Equalization of Non-Linear Distortion], Institute of Electronics, Information, and Communication Engineers Technical Research Report, MR91-54-64, vol. 91, No. 385 (Dec. 17, 1991), pp. 23-18.
Hitoshi Matsui, "Chien Hantei Kikangata Saiyuu Fukugoho ni yoru Hisenkeiwai no Toka Tokusei" [Characteristics in Equalization of Non-Linear Distortion by Delayed Decision-Feedback Maximum Likelihood Decoding Method], Proceedings of the Fall, 1991 Conference of the Institute of Electronics, Information, and Communication Engineers, [vol. 5] (Aug. 15, 1991), pp. 5-17.
Matui, "Adaptive Reduced-State Sequence Estimation in Magnetic Digital Recording Channels" NEC Research & Develop. 35:188-194 (1994).
Duel-Hallen, "Delayed Decision-Feedback Sequence Estimation" IEEE Transaction on Communications 37:428-436 (1989).

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