Method for obtaining bit-specific reliability information

Details Method for obtaining bit-specific reliability information Method for obtaining bit-specific reliability information

1995-09-05

1998-08-04

Chin, Wellington

Pulse or digital communications

Testing

375227, 375285, 371 6, 371 43, H04B 0000

Patent

active

057905959

ABSTRACT:
In a method for demodulation of multistage-modulated data, correspondence variables (decision variables) are determined from the comparison of the received signal with stored signals, and these correspondence variables are converted into a posteriori symbol probabilities. The received signal represents a symbol which in turn represents a data group. The a posteriori symbol probabilities are now accounted for in turn such that one individual probability information item is produced for each bit of a data group, which information indicates the probability of a relevant bit being +1. Reliability values are determined from these bit-specific probabilities, and these reliability values are output, together with the bits, as soft bits.

REFERENCES:
patent: 4224689 (1980-09-01), Sundberg
patent: 5119400 (1992-06-01), Koch
patent: 5222101 (1993-06-01), Ariyavisitakul et al.
patent: 5333150 (1994-07-01), Ketterling
patent: 5335250 (1994-08-01), Dent et al.
patent: 5414738 (1995-05-01), Bienz
patent: 5432821 (1995-07-01), Polydoros et al.
patent: 5537444 (1996-07-01), Nill et al.
Vardy, A. et al: "Bit Level Soft Decision Decoding of Reed-Solomon Codes", Proceedings of the 16th IEEE Conference of Electrical and Electronics Engineers in Israel, 7-9 Mar. 1989, New York, US.
Bahl, L. R. et al, "Optimal Decoding of Linear Codes For Minimizing Symbol Error Rate", Transcactions on Information Theory, Bd IT-20, Nr. 2, Mar. 1974, New York, US.
Woerz T et al.: "Iterative Decoding For Multilevel Codes Using Reliability Information", Globecom '92, Communication For Global Users, Bd. 3 of 3, 6-9 Dec. 1992, New York, US.
Kazuhiko Yamaguchi.: "A Soft Decision Viterbi Decoding Method Using Received Carrier Level In Fading Channel", Electronics & Communications in Japan, Part I--Communications, Bd. 73, Nr. 2, 1 Feb. 1990, New York, US.
Hagenauer, J.: "Viterbi decoding of convolutional codes for fading--and burst-channels", 1980 International Zurich Seminar On Digital Communications, 4-6 Mar. 1980, New York, US.
Benthin, M. et al.: "Viterbi Decoding of Convolutional With Reliability Information For A Noncoherent Rake-Receiver In A CDMA-Environment", Proceedings of the Global Telecommunications Conference (Globecom), San Francisco, Nov. 28-Dec. 2, 1994, Bd. 3 of 3, 28 Nov. 1994, Institute of Electrical and Elctronics Engineers.
A.J. Viterbi, "Performance of power-controlled wideband terrestrial digital communication", IEEE Transactions on Communications, vol. 41, No. 4, Apr. 1993, p. 559 et seq.
Proakis, "Digital Communications", McGraw-Hill Int. Book Company, 1983, ISBN 0-07-Y 66490-0, Chapter 4, p. 139 et seq.
J.G. Proakis, Digital Communications, McGraw-Hill, New York, 1983, Chapter 7.5.

Affiliated with

Also associated with

Rating

Method for obtaining bit-specific reliability information does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for obtaining bit-specific reliability information, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for obtaining bit-specific reliability information will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1186352