Accessing LP transponders with CP terminals via wavefront multiplexing techniques
First Claim
1. A satellite communication system comprising:
- a satellite comprising;
a first transponder configured to form a first communication channel having a first polarization of a first polarization format; and
a second transponder configured to form a second communication channel having a second polarization of the first polarization format;
wherein the first transponder is configured to receive via the first communication channel at a first frequency slot a first combination of signals including a first linear combination of a first signal and a second signal, the first signal being transmitted by a first terminal via a third communication channel having a third polarization of a second polarization format, the second signal being transmitted by a second terminal via a fourth communication channel having a fourth polarization of the second polarization format,wherein the second transponder is configured to receive via the second communication channel at the first frequency slot a second combination of signals including a second linear combination of the first signal and the second signal, andwherein the first polarization format is different from the second polarization format.
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Accused Products
Abstract
The invention is about a method and apparatus for grouping multiple satellite transponders with both (LP) polarization formats in different frequencies through Wave-Front (WF) Multiplexing (muxing) techniques for ground terminals with incompatible (CP) polarization formats. As a result of this invention, linear polarized (LP) transponders can be accessed and efficiently utilized by circularly polarized (CP) ground terminals and vice versa. This invention consists of conventional ground terminals, a unique organization of space assets, and a unique polarization alignment processor. The applications of wavefront multiplexing techniques to satellite communications offer many potential advantages, including improved flexibility and utility efficiency of existing space assets. Our proposed “Polarization Utility Waveforms” is an entirely new concept in VSAT and Earth Station Antenna diversity. The implementation enables antennas to switch between different polarization formats at the press of a button, and provides teleport operators with greater flexibility in how they manage their assets.
40 Citations
18 Claims
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1. A satellite communication system comprising:
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a satellite comprising; a first transponder configured to form a first communication channel having a first polarization of a first polarization format; and a second transponder configured to form a second communication channel having a second polarization of the first polarization format; wherein the first transponder is configured to receive via the first communication channel at a first frequency slot a first combination of signals including a first linear combination of a first signal and a second signal, the first signal being transmitted by a first terminal via a third communication channel having a third polarization of a second polarization format, the second signal being transmitted by a second terminal via a fourth communication channel having a fourth polarization of the second polarization format, wherein the second transponder is configured to receive via the second communication channel at the first frequency slot a second combination of signals including a second linear combination of the first signal and the second signal, and wherein the first polarization format is different from the second polarization format. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification