Data transmission with dual psk modulation
CA 1060554 A · Owner: Cselt - Centro Studi E Laboratori Telecommunicazioni S.P.A. · Inventors: Porzio Giusto, Pietro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A binary data stream of cadence f to be transmitted by PSK (phase-shift keying) modulation is split into two pulse sequences composed of alternate bits of that data stream which are translated, into 180° phase shifts of respective sinusoidal carrier waves in quadrature with each other, the frequency f of the two carrier waves being the reciprocal of the pulse width 2/f of the two pulse sequences in a specific instance. A pair of interleaved trains of trigger pulses, each coinciding with the zero crossings of a respective carrier wave, enable the operation of associated phase shifters -- in response to amplitude changes of the respective pulse sequences -- only at a peak of a carrier wave in …
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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 August 14, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 14, 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.