Moam trellis coded modulation technique using industry standard viterbi decoder rate 1/2 and additional simple logic
CA 2092608 A1 · Owner: Gagnon, Francois · Inventors: Gagnon, Francois; Batani, Naim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is intended for improving the error performance of Forward Error Correcting (FEC) coding techniques used in bandwidth efficient digital communication channels. It consists of combining coding with two dimensional signal constellation for M-ary Quadrature Amplitude Modulation (MQAM). The novelty in this approach lies in the fact that the system architecture uses an industry standard rate 1/2 convolutional code for all values of M. This is in conjunction with new mapping and unmapping techniques and an industry standard soft decision Viterbi decoder.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 12, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.