Telemetry tracking and command satellite link

Details Telemetry tracking and command satellite link Telemetry tracking and command satellite link

2002-02-04

2010-12-21

Nguyen, Tu X (Department: 2618)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C342S357490

Reexamination Certificate

active

07856232

ABSTRACT:
The invention relates to a telemetry, control, and ranging link of a satellite; it proposes using spread spectrum transmission for the up link, i.e. for commanding the satellite and for the ranging up signal. It proposes using subcarrier modulation for the down link, i.e. for telemetry and for the ranging down signal. This makes it possible for the up link to withstand interference and to provide co-localization; on the down link, the use of subcarrier modulation makes it possible to continue using existing equipment and known solutions.

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