Channel-independent equalizer device

Pulse or digital communications – Receivers – Particular pulse demodulator or detector

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

375348, H04L 2706, H04L 2722

Patent

active

055576451

ABSTRACT:
A demodulator for demodulating a signal modulated with digital information symbols so as to extract the information symbols is disclosed. A receiver receives a signal over a communications channel and samplers and digitizers produce a sequence of numerical sample values representative of the received signal. Memories are provided each having a number of state memories each associated with a hypothesized symbol string. A controller selectively retrieves values from the memory means and controls the timing of operations thereupon. A metric computer computes candidate metrics using a hypothesis of a next of the information symbols to be demodulated made by the controller, one of the numerical sample values, path metric values, B-matrices, and U-vectors and the candidate metrics associated state number selected by the controller from the memory means. A best predecessor computer determines the best of the candidate metrics to be selected to be written back into the memory means along with a successor B-matrix, U-vector and path history. The successor B-matrices, U-vectors and path history are then updated using corresponding values associated with the best predecessor and one of numerical sample values.

REFERENCES:
patent: 5119400 (1992-06-01), Koch
patent: 5131011 (1992-07-01), Bergmans et al.
patent: 5164961 (1992-11-01), Gudmundson
patent: 5199047 (1993-03-01), Koch
patent: 5307374 (1994-04-01), Baier
patent: 5331666 (1994-07-01), Dent
patent: 5335250 (1994-08-01), Dent et al.
Yunxin LI et al., "Decoding of Convolutional Codes by Viterbi Blind Algorithm," Communications on the Move, Singapore, ICCS/ISITA '92, pp. 877-881, Nov. 16-20, 1992.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Channel-independent equalizer device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Channel-independent equalizer device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Channel-independent equalizer device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-419922

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.