Channel code decoding for the cdma forward link
CA 2405322 A1 · Owner: Krzymien, Witold A. · Inventors: Messier, Geoffrey G.; Krzymien, Witold A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Channel coding is used on the forward link of a CDMA cellular telephone network to, allow the CDMA mobile channel decoder to perform error correction. On a wireless link, channel code performance is improved by providing the channel decoder with an estimate, of the reliability of each received symbol. This reliability information is typically the, ratio of desired signal energy to interference plus noise variance at the channel decoder, input. This invention improves CDMA mobile channel decoder performance using a new, technique for calculating more accurate estimates of the signal to interference plus noise, ratio at the input of the mobile channel 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 September 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2024.
- 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.