08055257 is referenced by 8 patents and cites 285 patents.

A radioterminal communications system includes an ancillary terrestrial component configured to receive from at least some of a plurality of radioterminals using frequencies from a first satellite frequency band (e.g., an L-band) and to transmit to at least some of the plurality of radioterminals using frequencies from a second satellite frequency band (e.g., an S-band). The system further includes a space-based component configured to communicate with the plurality of radioterminals using at least some of the frequencies from the first satellite frequency band and/or at least some of the frequencies from the second satellite frequency band. In some embodiments the ancillary terrestrial component communicates with radioterminals using a Time Division Duplex (TDD) mode and the space-based component communicates with the same or other radioterminals using a Frequency Division Duplex (FDD) and/or a TDD mode.

Title
Systems and methods with different utilization of satellite frequency bands by a space-based network and an ancillary terrestrial network
Application Number
12/609726
Publication Number
8055257 (B2)
Application Date
October 30, 2009
Publication Date
November 8, 2011
Inventor
Peter D Karabinis
Cary
NC, US
Agent
Myers Bigel Sibley & Sajovec P A
Assignee
ATC Technologies
VA, US
IPC
H04W 84/06
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