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

• US 20100184381A1
• 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:
  US12/689,753
• Publication Number:
  US 20100184381A1
• Time in Patent Office: Days
• US Class Current: 455/63.100
• 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 radioterminal configured to communicate with a space-based component by receiving a first signal over a first antenna pattern of the space-based component and at least one second signal over at least a second antenna pattern of the space-based component, wherein the at least one second signal differs from the first signal by at least a time delay value;

the radioterminal configured to process the first signal and the at least one second signal to improve at least one communications performance measure.

2. A method of communicating with a space-based component, comprising:

receiving a first signal over a first antenna pattern of the space-based component and at least one second signal over at least a second antenna pattern of the space-based component, wherein the at least one second signal differs from the first signal by at least a time delay value; and

processing the first signal and the at least one second signal to improve at least one communications performance measure.