Satellite communication receiving apparatus

Details Satellite communication receiving apparatus Satellite communication receiving apparatus

1994-12-22

1996-08-27

Chin, Stephen

Pulse or digital communications

Receivers

Automatic frequency control

H04L 2706

Patent

active

055508715

ABSTRACT:
A satellite communication receiving apparatus capable of receiving a satellite communication broadcasting using an L-band and Phase Shift Keying(PSK) by sharing a temperature compensation voltage control oscillator with a voltage control oscillator used in Costas-loop and a local oscillator used in an intermediate frequency apparatus, thereby securing an effective satellite communication broadcasting receiving and facilitating a simplification thereof is disclosed. The present invention includes a modulator for generating an intermediate frequency using a satellite broadcasting signal obtained through an L-band receiving antenna, a low-noise amplifier a first band filter and a local oscillating frequency oscillated by an external base frequency; a Costas loop circuit for recovering an intermediate frequency obtained at the modulator using a base frequency shifted by 90.degree.; and sampling circuit for obtaining modulation data by sampling the signals at the Costas loop circuit.

REFERENCES:
patent: 4896336 (1990-01-01), Henely et al.
patent: 5271041 (1993-12-01), Montreuil
patent: 5375146 (1994-12-01), Chalmers

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