Switching techniques for fdm communication systems
CA 1269159 C · Owner: Gans, Michael James · Inventors: Darcie, Thomas Edward; Gans, Michael James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a switching technique for packet Frequency Division Multiplexed (FDM) communication systems. In the present system, each of N system users is assigned (a) either a separate fixed one of N transmit frequency channels or a selected free one of L transmit frequency channel for communications to a head-end FDM channel switching means, and (b) a fixed assigned separate one of N receive channels for communications from the head-end FDM channels switching means. At the FDM channel switching means all FDM channel signals received from the system users are directed into separate paths through the switching means. The signals in each path are demodulated to baseband …
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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
- Granted May 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
- 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.