Spread spectrum demodulator
CA 1066779 A · Owner: Ncr Corporation · Inventors: Sanders, David E.; Gordy, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a demodulator for demodulating a wideband spread spectrum four-phase PSK (phase shift keyed) modulated carrier signal wherein the phase modulation was in response to an encoded data signal and wherein the encoding of the data signal and spreading of the spectrum was accomplished by the mixing of the data signal with a pseudo-random pulse sequence (PN-sequence). The demodulator is comprised in part of a generator means for providing a pseudo-random pulse sequence corresponding to the sequence used to encode the data signal; and an encoding means for converting the provided PN-sequence into a four-phase PN sequence. A correlation means correlates the …
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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 November 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 20, 1996.
- 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.