Frequency control apparatus for base station in satellite commun

Details Frequency control apparatus for base station in satellite commun Frequency control apparatus for base station in satellite commun

1994-03-30

1997-12-23

Vo, Nguyen T.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455264, 455265, H04B 116

Patent

active

057016020

ABSTRACT:
A frequency control apparatus for compensating frequency fluctuation in an input received signal from a satellite station of a satellite communication system, comprises a PLL arrangement for generating a frequency converting signal in response to the frequency fluctuation in the input received signal, a mixer for mixing the input received signal and the frequency converting signal to deliver a resultant output signal, and a control circuit for designating a predetermined signal as the frequency converting signal when the PLL arrangement becomes a phase-unlocked state.

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