Adaptive Antenna Beam Steering for Satellite Interference Mitigation
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Solution Overview
Problem
Satellite communication systems face interference issues with non-target satellites due to the wide beamwidth axis of antennas, limiting the geographic area where services can be provided without causing excessive interference.
Innovation Solution
An adaptive pointing system for mobile antennas that adjusts the beam's pointing direction to an offset away from non-target satellites when interference reaches a threshold, maintaining communication with the target satellite while minimizing interference with other satellites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the antenna uses a narrow beamwidth to avoid interference with non-target satellites, then interference with non-target satellites is reduced, but the geographic area where communication services can be provided is limited
Solution Approach 1:
The patent applies dynamic beam steering to adjust the antenna beam direction in real-time based on the mobile terminal's geographic location. The system dynamically calculates the optimal beam direction to maintain communication while avoiding interference with non-target satellites, allowing service coverage to extend beyond fixed geographic restrictions.
Solution Approach 2:
The system changes the beam direction parameter adaptively based on location. By adjusting the pointing direction of the antenna beam according to the mobile terminal's geographic position, the system maintains effective communication coverage while dynamically avoiding interference zones with non-target satellites.
2Reliability
If the antenna beam is pointed directly at the target satellite, then communication quality with the target satellite is maximized, but interference with nearby non-target satellites increases
Solution Approach 1:
The patent applies local quality by creating an asymmetric beam pattern where the narrow beamwidth axis is oriented toward the target satellite for high-quality communication, while the wide beamwidth axis extends in a direction away from non-target satellites to minimize interference. This directional differentiation allows simultaneous optimization of communication quality and interference avoidance.
Solution Approach 2:
The system employs asymmetric beam shaping with different beamwidths in different directions. The narrow beamwidth is directed at the target satellite to maximize signal strength and communication reliability, while the wide beamwidth axis is oriented away from non-target satellites to reduce interference, creating an asymmetric radiation pattern optimized for both objectives.
3Area of stationary object
If the antenna uses a wide beamwidth axis to provide broader coverage, then geographic area for services is expanded, but interference with non-target satellites reaches excessive levels
Solution Approach 1:
The system dynamically adjusts the beam direction based on the mobile terminal's location and the positions of target and non-target satellites. By continuously adapting the pointing direction, the system maintains broad geographic coverage through the wide beamwidth axis while dynamically steering the beam away from non-target satellites to prevent excessive interference.
Solution Approach 2:
The system changes the beam direction parameter adaptively based on geographic location and satellite positions. This allows the wide beamwidth axis to provide broad coverage in directions away from non-target satellites while maintaining service availability across a large geographic area without causing excessive interference.
Data Source
AI summary
Systems and methods are described herein for adaptive pointing operations of a mobile antenna system that can be used to provide communication with a target satellite over a large geographical area, while also satisfying interference requirements with one or more other satellites. In particular, the adaptive pointing operations described herein control pointing of a beam of the antenna system towards the target satellite in a manner that takes into consideration the interference requirements of the other satellites. In some embodiments, the mobile antenna system can provide non-interfering communication with the target satellite, over the entire or substantially the entire coverage area (or footprint) of the target satellite. In doing so, services such as Internet, telephone and/or television services provided by the target satellite can be delivered to users throughout most or all of the satellite's coverage area, while also satisfying interference requirements with other satellites.