Telecommunications – Carrier wave repeater or relay system – With frequency conversion
Patent
1992-03-30
1994-01-04
Dwyer, James L.
Telecommunications
Carrier wave repeater or relay system
With frequency conversion
455 23, 455 511, 455 75, 455260, 455265, H04B 715
Patent
active
RE0344990
ABSTRACT:
A frequency modulated radio frequency broadcast network in which re-transmitting stations employ a synchronous frequency modulated booster system. Included in the frequency modulated booster system is a synchronous frequency [modualted] modulated exciter for converting a frequency modulated intermediate frequency into a frequency modulated broadcast signal. The synchronous frequency modulated [exicter] exciter includes phase locked loop circuits for synchronizing the re-transmitted frequency modulated broadcast signal with the frequency modulated intermediate frequency signal by detecting reference signals in the composite baseband of the intermediate frequency signal and in the composite signal frequency modulated broadcast signal.
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Hu Charlie L.
Law Yee S.
Wu Joseph C.
Dwyer James L.
Pham Chi H.
TFT, Inc.
Wiseman Jack M.
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