Beam-Group Steering Weights for Satellite Coverage
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Solution Overview
Problem
Existing beamforming technologies face challenges in efficiently managing a large number of beams for directional signal transmission or reception, particularly in satellite communications, where implementing hundreds of beams requires complex and resource-intensive designs.
Innovation Solution
The approach involves defining beamforming weights to create spatially non-overlapping beams within a beam group with fixed spatial relationships, and applying beam-group steering weights to steer the entire beam group in a common direction, using a combination of fixed and variable beamforming circuitry to simplify the structure and reduce resource requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large number of beams are implemented for satellite communications, then signal coverage is improved, but device complexity increases
Solution Approach 1:
The patent segments the beamforming task into two distinct parts: (1) defining a beam group with fixed spatial relationships using a reduced set of beamforming weights, and (2) steering the entire beam group in different directions using beam-group steering weights. This segmentation allows the system to achieve coverage of multiple beam directions without requiring separate beamforming circuits for each beam, thereby reducing device complexity while maintaining signal coverage area.
Solution Approach 2:
The beam-group steering weights serve a universal function by enabling the same beamforming circuitry to steer the beam group in multiple different directions. Instead of requiring dedicated beamforming elements for each beam direction, the system uses a single set of beamforming weights combined with variable steering weights, making the beamforming structure multi-functional and reducing overall complexity.
2Area of stationary object
If multiple sets of delay elements are used to form multiple beams simultaneously, then beam coverage is improved, but resource requirements increase
Solution Approach 1:
The patent merges the functionality of multiple delay element sets into a single set by combining beamforming weights with beam-group steering weights. The beam-group steering weights act as a unifying mechanism that allows one set of delay elements to perform the work of what would traditionally require multiple separate sets, thereby reducing the quantity of delay elements needed while maintaining comprehensive beam coverage.
Solution Approach 2:
The system uses dynamic beam-group steering weights that can be adjusted to steer the beam group in different directions at different times. This dynamic approach replaces the need for static, fixed configurations of multiple delay element sets, allowing the same physical resources to serve multiple beam coverage areas through time-division or flexible weighting, thereby reducing the total quantity of delay elements required.
3Device complexity
If beamforming circuitry is simplified, then device complexity is reduced, but beam steering flexibility may be compromised
Solution Approach 1:
The patent introduces dynamic beam-group steering weights that provide flexibility in steering the beam group to different directions. This dynamic component compensates for the simplification of the beamforming circuitry by enabling adaptive steering capabilities. The steering weights can be adjusted based on operational requirements, maintaining versatility despite the reduced complexity of the underlying beamforming circuitry.
Solution Approach 2:
The beam-group steering weights act as an intermediary layer between the simplified beamforming circuitry and the required beam steering functionality. Instead of requiring complex circuitry to directly achieve steering, the steering weights serve as a mediator that translates simple beamforming operations into directed beam group steering, thereby maintaining adaptability while keeping the circuitry simple.
Data Source
AI summary
A beamforming method (700) and apparatus (10) disclosed herein use an advantageous approach to beamforming involving the application of beamforming weights (24) that define respective beams (72) of a beam group (70) as spatially non-overlapping and having fixed spatial relationships within the beam group (70), and the application of beam-group steering weights (28) that steer the respective beams (72) of the beam group (70) in a common direction. The arrangement allows, for example, limiting the beamforming structure of the beamformer (12) to that needed for defining the beam group (70), with beam-group steering then used to point the beam group (70) in various directions to provide greater signal coverage over time.