End-to-End Beamforming Weights for Satellite Relay Multipath Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless relay communication systems face challenges in efficiently managing beamforming for satellite communication systems, particularly in forming end-to-end beams that cover large geographic areas while minimizing complexity and interference, which affects data capacity and system design.
Innovation Solution
The implementation of an end-to-end beamforming system that computes and applies beam weights within a ground network, using a central processing system to form end-to-end beams through an end-to-end relay, which includes multiple transponders and antennas to induce multipath channels, allowing for the formation of user beams and feeder beams with a single set of weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If narrow beams are formed to focus transmitted energy to the wireless relay, then transmission efficiency is improved, but the coverage area is reduced
Solution Approach 1:
The patent segments the coverage area into multiple regions, each served by a dedicated narrow beam. The wireless relay forms multiple narrow transmit beams to different ground stations within its coverage area, allowing each beam to maintain high efficiency while collectively covering a large geographic region. This segmentation resolves the contradiction by enabling both narrow focused beams and broad overall coverage through spatial division.
2Area of stationary object
If multiple beams are formed to cover large geographic areas, then coverage area is improved, but system complexity increases
Solution Approach 1:
The patent merges the beamforming functionality into a single wireless relay that handles multiple beams simultaneously. The relay combines signal reception from multiple ground stations and transmits to multiple destinations using coordinated beamforming, reducing the need for separate beamforming systems at each endpoint. This merging approach reduces overall system complexity while maintaining large area coverage through the relay's centralized beam management.
3Reliability
If narrow receive beams are formed to gather energy from the wireless relay, then signal quality is improved, but interference from other sources is reduced
Solution Approach 1:
The patent implements dynamic beamforming where the wireless relay continuously adjusts the direction and focus of its transmit and receive beams based on the relative positions and requirements of ground stations. This dynamic adaptation allows the system to maintain optimal signal quality and minimize interference in real-time as satellites move and ground stations change positions, resolving the contradiction between focused signal reception and interference reduction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables efficient data transmission over large areas by forming end-to-end beams that enhance data capacity, reduce system complexity, and improve interference management, thereby optimizing the performance of satellite communication systems.
Implementation Method 1
a beam may be formed electronically by adjusting the gain and phase (or time delay) of signals that are transmitted, received, or both from several elements of a phased array antenna
Implementation Method 2
Such antennas typically have a paraboloid shaped reflector to focus the beam
Data Source
AI summary
Methods and systems are described for providing end-to-end beamforming. For example, an end-to-end beamforming system include a relay satellite and a ground network to provide communications to user terminals located in user beam coverage areas. The ground network includes geographically distributed access nodes and a central processing system (CPS). Beamformers of the ground network generate forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the satellite, produce forward downlink signals that combine to form forward user beams.