Soft decision signal outputting receiver

Details Soft decision signal outputting receiver Soft decision signal outputting receiver

1995-06-21

1997-04-15

Chin, Stephen

Pulse or digital communications

Receivers

Automatic baseline or threshold adjustment

375341, H04L 2506

Patent

active

056217641

ABSTRACT:
A receive condition in burst transmission varies in units of a burst or a plurality of symbol times. The present invention provides a soft decision signal outputting receiver which can simply produce correct reliability information even if the receive condition varies while employing a simple reliability information production method. A demodulator demodulates a burst signal to obtain a hard decision signal. A time-varying reliability information production circuit receives information of a demodulation process from the demodulator 11 and produces reliability information regarding the hard decision signal. The time-varying reliability information production circuit receives signal quality information which reflects a receive condition for each burst or each plurality of symbol times, and changes, based on the signal quality information, a production method for reliability information or elements such as threshold levels to be used in a production method for each burst or each plurality of symbol times. A soft decision signal production circuit produces a soft decision signal from the hard decision signal and the reliability information.

REFERENCES:
patent: 5425037 (1995-06-01), Uesugi et al.
"Soft Decision Technique", Journal of the IECE of Japan, 1984, 67(5):564-568.
Proakis, Digital Communications, McGraw-Hill, 2nd Edition, 1989, pp. 548-555.
Hagenauer et al., "A Viterbi Algorithm with Soft-Decision Outputs and its Applications", Proc. Globecom, 1989, pp. 1680-1686.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-367403