Ofdm system with simple terminals
CA 2313672 A1 · Owner: Telecommunications Research Laboratories · Inventors: Mcgibney, Grant
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is a wireless network based on orthogonal frequency division multiplexing (OFDM). In a conventional OFDM system the signal processing , hardware is, divided equally between the base station and the terminal. In this invention most of the, complex signal processing hardware is shifted to the base station making the , terminal a, simpler and more power-efficient device. To send information to the base station, the terminal, transmits a series of QPSK symbols that make up an OFDM-code. The code is designed to, distribute the signal's energy into a number of OFDM sub-carriers which can be detected and, combined within the base station's OFDM receiver. Other users transmit the …
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 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 2022.
- 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.