Mitigation of co-channel interference in synchronization bursts in a multi-beam communication system
CA 2307995 C · Owner: Northrop Grumman Corporation · Inventors: Linsky, Stuart T.; Caso, Gregory S.; Wright, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a cellular satellite system such as Astrolink where, same frequency, same polarization (same "color") signals are used in multiple ground cells, there exists the possibility of interference and false reception of uplink Synchronization Bursts (SB) in systems employing TDMA access of the frequency in question. In such systems, a SB transmitted from one terminal may be received in more than one satellite beam. The reception of the signal from a terminal in an undesired beam (330) is erroneous and may adversely impact the time synchronization (360) of the desired terminal. For example a, system may employ Maximal Length (ML) Pseudo-Noise (PN) sequences (410) for its SBs wherein every beam …
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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 May 10, 2000 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 2022.
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