Telecommunications – Transmitter and receiver at separate stations
Patent
1995-04-25
1998-05-12
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455 561, 455 62, 455 671, 4552261, 379 29, 379 58, H04Q 734
Patent
active
057521646
ABSTRACT:
A Personal Communications Service (PCS) System is described. The frequency control system (30) allows PCS systems to coexist in the same frequency band as Private Operational Fixed Microwave Service (POFS) systems without mutual interference. This system (30) 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 (30) 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) (50), comprised of interference analysis/frequency planning computer programs with supporting data bases and data communication links. The FAST system makes use of an autonomous measured signal gathering system. Each base station, or other fixed site, and a Test Mobile Unit is equipped with a Remote Measurement Unit (RMU). The RMU is comprised of a microcontroller, spectrum analyzer and modem (if located at the base station). Under the automatic direction and control of the microcontroller and CUC, the spectrum analyzer is directed to take signal power measurements across a frequency band of interest. The RMU processes, packages and stores the measurements into data files for transfer to the CUC. The CUC uses these measurements as part of the CUV and MDA mechanisms.
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American PCS L.P.
Eisenzopf Reinhard J.
Sobutka Philip J.
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