US2008268836A1PendingUtilityA1
Space-Based Network Architectures for Satellite Radiotelephone Systems
Est. expirySep 14, 2021(expired)· nominal 20-yr term from priority
H04B 7/18563H04B 7/18539H04B 7/18513H04B 7/216H04B 7/18534
50
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Claims
Abstract
A space-based network for a satellite radiotelephone system includes at least one receive-only satellite and at least one transmit satellite. The transmit satellite can be a transmit-only satellite or a transmit and receive satellite. The receive-only satellite(s) are configured to receive wireless communications from a radiotelephone at a location over a satellite frequency band. The transmit satellite(s) are configured to transmit wireless communications to the radiotelephone at the location over the satellite frequency band. By providing at least one receive-only satellite and at least one transmit satellite, space-based networks can offer a significant link margin, without the need to undesirably burden the radiotelephones themselves to achieve this link margin.
Claims
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48 . A space-based network for a satellite radiotelephone system comprising a first number of antennas each of which is configured to receive information and a second number of antennas each of which is configured to transmit information, wherein the first number of antennas equals or exceeds the second number of antennas, at least one antenna of the first number of antennas is configured to receive information from a radiotelephone over at least two substantially orthogonal polarizations and the radiotelephone is configured to radiate electromagnetic energy substantially concurrently over each one of the least two substantially orthogonal polarizations and to radiate substantially the same information over each one of the at least two substantially orthogonal polarizations.
49 . A space-based network according to claim 48 further comprising:
a gateway that is configured to process at least two signals associated respectively with at least two antennas of the first number of antennas in order to recover information transmitted to the space-based network by a radiotelephone.
50 . A space-based network according to claim 48 further comprising:
a gateway that is configured to process at least two signals associated respectively with the at least two substantially orthogonal polarizations in order to recover information transmitted to the space-based network by a radiotelephone.
51 . An antenna for a space-based network, the antenna comprising:
a plurality of elements configured to receive information from a radiotelephone over at least two substantially orthogonal polarizations, wherein the radiotelephone is configured to transmit information to the antenna via at least one direct Line-of-Sight (LOS) wireless link between the radiotelephone and the antenna and the radiotelephone is further configured to radiate electromagnetic energy substantially concurrently over each one of the at least two substantially orthogonal polarizations and to radiate substantially the same information over each one of the at least two substantially orthogonal polarizations.
52 . An antenna according to claim 51 further comprising:
an electronics subsystem that is configured to receive signals from the antenna and to transmit signals to a gateway that is configured to process signals associated respectively with the at least two substantially orthogonal polarizations in order to recover information transmitted to the space-based network by the radiotelephone.
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