Overlay of a forward link on broadband satellite signals
AssigneeHughes Network Systems, LLC
InventorsLin-Nan Lee, Udaya Bhaskar
Life of this patent
Estimating the term…
Abstract
Various arrangements for a satellite-based forward link overlay are presented herein. In some embodiments, broadband data is modulated at a particular frequency, phase, and/or timing to create a broadband data signal. The frequency, phase, and/or timing are used to modulate a low-bandwidth data signal. The low-bandwidth data signal can then be combined with the broadband data signal and transmitted via satellite to a geographic region. A low-bandwidth receiver unit may determine the frequency, phase, and/or timing from the embedded broadband signal and use such information to demodulate and despread the low-bandwidth data signal.
Claims21
(canceled)
A satellite-based forward link overlay system, comprising:
- a satellite antenna;
- and
- a satellite terminal, configured to be connected with the satellite antenna, configured to:
- receive a combined forward link signal from the satellite antenna, wherein the combined forward link signal comprises an overlay signal and a broadband data signal;
- analyze the combined forward link signal to determine a frequency, phase, and timing of the broadband data signal of the combined forward link signal;
- perform despreading and demodulation of the overlay signal using the determined frequency, phase, and timing of the broadband data signal to obtain overlay data;
- and
- output the obtained overlay data.
A satellite terminal system, comprising:
- a broadband feature recovery system, configured to:
- receive a combined forward link signal from a satellite antenna, wherein the combined forward link signal comprises an overlay signal and a broadband data signal;
- analyze the combined forward link signal to determine a frequency, phase, and timing of the broadband data signal of the combined forward link signal;
- and
- output the determined frequency, phase, and timing of the broadband data signal;
- and
- an overlay recovery system, configured to:
- receive the determined frequency, phase, and timing of the broadband data signal from the broadband feature recovery system;
- perform despreading and demodulation of the overlay signal from the combined forward link signal using the determined frequency, phase, and timing of the broadband data signal to obtain overlay data;
- and
- output the obtained overlay data.
A method for obtaining data from a combined forward link signal by a satellite terminal, the method comprising:
- receiving the combined forward link signal from a satellite antenna, wherein the combined forward link signal comprises an overlay signal and a broadband data signal;
- analyzing the combined forward link signal to determine a frequency, phase, and timing of the broadband data signal of the combined forward link signal;
- and
- performing despreading and demodulation of the overlay signal using the determined frequency, phase, and timing of the broadband data signal to obtain overlay data;
- and
- outputting the obtained overlay data.
Dependencies are inferred from the claim text.