Maximum likelihood sequence estimator and maximum likelihood seq

Details Maximum likelihood sequence estimator and maximum likelihood seq Maximum likelihood sequence estimator and maximum likelihood seq

1996-02-22

1999-02-02

Vo, Don N.

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

375341, 371 436, H04L 512

Patent

active

058675310

ABSTRACT:
When a maximum likelihood sequence estimator according to the present invention is used as an equalizer or the like for a receiver, a Viterbi algorithm processing portion 331 in the maximum likelihood sequence estimator estimates a transmission symbol Ea.sub.n with a reception signal y.sub.n and an estimated impulse response {Eh.sub.k } corresponding to Viterbi algorithm so as to estimate a maximum likelihood sequence corresponding to a soft decision regardless of a modulating method. A transmission logic code decoder 34 converts a transmission symbol Ea.sub.n into hard decision data Eb.sub.m with a value "1" or "0". An envelope detector 333 that is a transmission line quality evaluating means detects an envelope level p.sub.n of the reception signal y.sub.n. A soft decision value converting portion 334 converts the envelope level p.sub.n received from the envelope detector 333 corresponding to the value "1" or "0" of the hard decision data Ebm received from the transmission logic code decoder 34 so as to obtain soft decision value output data q.sub.m.

REFERENCES:
patent: 4197500 (1980-04-01), Klein et al.
patent: 5251233 (1993-10-01), Labedz et al.
patent: 5271042 (1993-12-01), Borth et al.
B. Sklar; Channel Coding: Part 2; Digital Communications, Prentice Hall, 1988, pp. 314-338.
Joachim Hagenauer and Peter Hoeher; A Viterbi Algorithm with Soft-Decision Outputs and its Applications; Proceedings of Globecom '89, 1989 IEEE, pp. 1680 -1686.
J.G. Proakis; Maximum-Likelihood Sequence Estimation for Detection of ISI-Corrupted Signals and CPM Signals; Digital Communications, New York, McGraw-Hill, 1983, pp. 610-627.

Affiliated with

Also associated with

Rating

Maximum likelihood sequence estimator and maximum likelihood seq does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Maximum likelihood sequence estimator and maximum likelihood seq, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Maximum likelihood sequence estimator and maximum likelihood seq will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1124502