Mobile station equipment for a mobile radio telephone system

Details Mobile station equipment for a mobile radio telephone system Mobile station equipment for a mobile radio telephone system

1988-05-20

1990-06-05

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

455183, 455264, 455316, H04B 1116, H04B 126

Patent

active

049320726

ABSTRACT:
A mobile station equipment for a mobile radio telephone system uses a voltage-controlled, temperature-compensated crystal oscillator (VC-TCXO) as a reference oscillator for local oscillators in frequency converters which convert an RF signal into IF signals. The oscillation frequency of the VC-TCXO is controlled by counting the second IF information and evaluating its difference from a certain reference value. At reception, the local oscillators have their reference frequency stabilized based on the stable frequency information from the base station. The equipment is compact and has reduced power dissipation and lower manufacturing cost.

REFERENCES:
patent: 4476575 (1984-10-01), Franke et al.
patent: 4520474 (1985-05-01), vilmur
patent: 4521916 (1985-06-01), Wine
patent: 4619002 (1986-10-01), Thro
patent: 4727591 (1988-02-01), Manlove
Stuart J. Lipoff, `Logical`Design Relaxes Tough Crystal Standards, Aug. 1977, vol. 16, No. 8, pp. 52-60.

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