Satellite receiver having analog-to-digital converter demodulati

Details Satellite receiver having analog-to-digital converter demodulati Satellite receiver having analog-to-digital converter demodulati

1995-12-20

1997-05-13

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455 121, 455313, 375316, H04B 130

Patent

active

056302274

ABSTRACT:
A satellite receiver is provided which downconverts an incoming band of signals received at a carrier frequency to a signal spectrum centered about an intermediate frequency (IF). The IF signal spectrum is filtered to provide a group of signals therefrom. The group comprises a subset of all the signals in the incoming band of signals. The group of signals from the IF signal spectrum is sampled at a high frequency which is greater than the highest frequency present in the group but lower than the intermediate frequency, in order to provide the group of signals at baseband directly from the IF signal spectrum.

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patent: 4628506 (1986-12-01), Sperlich
patent: 5140694 (1992-08-01), Benden
patent: 5151926 (1992-09-01), Chennakeshu et al.
patent: 5557642 (1996-09-01), Williams
J. G. Proakis, "Digital Communications," Second Edition, McGraw-Hill Book Company, New York, New York, USA, 1989, pp. 53-54.
F. Ananasso, et al., "On-Board Processing Concepts for Multibeam Communication Satellites: Present Situation and Perspectives," Alta Frequenza, vol. 57, No. 10, 1988, Milano, Italy, pp. 535-544.
J. M. Kappes, et al., "Programmable Demultiplexer/Demodulator Processor," IEEE Military Communications Conference, vol. 1, No. 7.3, Jul. 1990, Monterey, California, USA, pp. 230-234.

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