Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission
Patent
1992-04-27
1995-04-25
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Single message via plural carrier wave transmission
455 331, 455 341, 455 62, 455 63, 455 673, 379 59, H04B 700
Patent
active
054107377
ABSTRACT:
A frequency agile sharing technology (FAST) system for controlling frequent usage in a communications system is disclosed. Specifically, a frequency agile sharing technology system of controlling frequency usage and eliminating interference for use with a Personal Communications Service (PCS) System is described. The frequency control system allows PCS systems to coexist in the same frequency band as Private Operational Fixed Microwave Service (POFS) systems without mutual interference. This system also controls frequency usage within a PCS system to eliminate interference from within the PCS system. This interference elimination system combines theoretical radio frequency interference analysis with measurements of actual frequency usage and allows for efficient and coordinated dynamic frequency allocation planning and management. To control frequency assignment and eliminate interference, the system employs several mechanisms including an intersystem interference analysis, an intrasystem interference analysis, a channel use verification (CUV) procedure, and a measured data analysis (MDA). These mechanisms are performed by a centralized controller, channel utilization controller (CUC), comprised of interference analysis/frequency planning computer programs with supporting data bases and data communication links. The system and method described allows for PCS frequency use around existing microwave users and can be readily adapted for use in any area and most efficiently make use of the available communications spectrum in that area. The system protects existing microwave users from interference while providing high quality PCS to subscribers utilizing small, low power and lightweight handsets in the same frequency band.
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American PCS L.P.
Eisenzopf Reinhard J.
Sobutka Philip J.
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