Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels
CA 2175488 C · Owner: Zehavi, Ephraim · Inventors: Zehavi, Ephraim
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An improved system and method for communicating information over in-phase (I) and quadrature phase (Q) communication channels in a spread spectrum communication system is disclosed herein. In an exemplary implementation first and second information signals (an bn) are respectively transmitted over the I and Q communication channels using direct sequence spread spectrum communication signals. In-phase pseudorandom noise (PNI) and quadrature phase pseudorandom noise (PNQ) signals of predetermined PN codes (178 180) are, used for spreading the first and second information signals (an bn), respectively. In particular, the PNI and PNQ signals are respectively combined with the first and second …
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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.
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- Filed October 27, 1994 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2016.
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