ADAPTIVE BEAM FORMING WITH MULTI-USER DETECTION AND INTERFERENCE REDUCTION IN SATELLITE COMMUNICATION SYSTEMS AND METHODS

• US 20100184427A1
• Filed: 01/19/2010
• Published: 07/22/2010
• Est. Priority Date: 01/05/2005
• Status: Abandoned Application

• Current Assignee: ATC Technology Corporation (FedEx Corporation)
• Original Assignee: ATC Technology Corporation (FedEx Corporation)
• Inventors: Karabinis, Peter D., Zheng, Dunmin
• Application Number:
  US12/689,788
• Publication Number:
  US 20100184427A1
• Time in Patent Office: Days
• US Class Current: 455/427
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system
• CPC Class Codes: H04B 7/18563 Arrangements for interconnecting multiple systems data switching networks H04L12/00

Abstract

Satellite communications methods include receiving communications signals including co-channel interference at a space-based component from a plurality of wireless terminals in a satellite footprint over a satellite frequency band and reducing interference in the communication signals by (a) performing co-channel interference reduction on the communications signals to generate a plurality of interference reduced signals and (b) performing multiple access interference cancellation on the interference reduced signals. An interference reducing detector for a satellite communications system includes an interference reducer configured to perform co-channel interference reduction on communications signals to generate a plurality of interference reduced signals, and a detector configured to perform multiple access interference cancellation on the interference reduced signals. Satellite communications systems and satellite gateways including interference reducing detectors are also disclosed.

Claims

1. A wireless communications system comprising a space-based component and an ancillary terrestrial network, wherein the ancillary terrestrial network provides control channel and traffic channel communications to a plurality of first radioterminals by using a first set of frequencies authorized for use by the space-based component to provide control channel and/or traffic channel communications more than a second set of frequencies authorized for use by the space-based component to provide control channel and/or traffic channel communications;

wherein the second set of frequencies is used preferentially by the space-based component to provide control channel and traffic channel communications to a plurality of second radioterminals within a geographic area.

2. The wireless communications system of claim 1, wherein the ancillary terrestrial network does not use the second set of frequencies.

3. A communications method for a wireless communications system comprising a space-based component and an ancillary terrestrial network, the method comprising:

providing control channel and traffic channel communications from the ancillary terrestrial network to a plurality of first radioterminals using a first set of frequencies authorized for use by the space-based component to provide control channel and/or traffic channel communications more than a second set of frequencies authorized for use by the space-based component to provide control channel and/or traffic channel communications; and

providing control channel and traffic channel communications from the space-based component to a plurality of second radioterminals within a geographic area using the second set of frequencies.

4. The method of claim 3, wherein the ancillary terrestrial network does not use the second set of frequencies.