Preamble using golay sequence for access channel in cellular communications systems
CA 2276971 A1 · Owner: Tong, Wen · Inventors: Tong, Wen; Le Strat, Evelyne; Massie, Bastien
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A preamble for a reverse access channel (RACH) of a CDMA (code division multiple access) communications system comprises a pair of constituent Golay sequences, A and B concatenated at least one pair and preferably a plurality of , different pairs of, transformed sequences which are also constituent Golay sequences each pair of, transformed sequences comprising a permutation of elements of the pair of sequences A, and B. The permutations can include a reversed order of elements in the sequences, a, reversed order of some or all of a set of address bits identifying locations of elements in, the sequences, a concatenation of subsets of elements in odd and even locations of the, sequences …
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 July 6, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2021.
- 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.