Multibeam VSAT for Clustered GSO Satellites
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Solution Overview
Problem
Current satellite communication systems face limitations in bandwidth effectiveness and data privacy when using Geostationary Satellite Orbits (GSO), particularly with single-beam VSAT antennas and lack of redundancy in satellite clusters, leading to inefficient data transport and security concerns.
Innovation Solution
Implementing incoherent wavefront multiplexing (WF muxing or K-muxing) techniques across a cluster of slightly inclined GSO satellites to enhance data privacy and reliability by transforming data streams into multiple parallel communication links, utilizing multibeam VSATs with smart antennas that can dynamically track and reconstitute data streams, and employing redundancy for graceful retirement and replenishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single-beam VSAT antenna is used to communicate with a GSO satellite, then the ground terminal structure is simple and easy to operate, but the bandwidth utilization is limited and data privacy is compromised
Solution Approach 1:
The patent segments the communication system into multiple satellites forming a cluster, where each satellite provides a separate communication link. The ground terminal uses multiple beam antennas to simultaneously communicate with multiple satellites, dividing the total bandwidth across multiple parallel links while maintaining operational simplicity through automated satellite selection and beam management
Solution Approach 2:
The patent transitions from a single-dimensional communication link (one antenna to one satellite) to a multi-dimensional network by introducing multiple satellites and multiple beams. This creates a spatial diversity dimension where data can be transmitted through multiple parallel paths, significantly increasing bandwidth utilization while the ground terminal automatically manages the complexity
2Device complexity
If a single-beam VSAT antenna is used, then the device complexity is low, but data privacy and reliability are insufficient
Solution Approach 1:
The communication data stream is segmented and distributed across multiple satellite links simultaneously. Each satellite carries a portion of the encrypted data, and the ground terminal reassembles the complete data stream by combining responses from multiple satellites. This segmentation provides inherent privacy protection and reliability, as compromising one link does not expose the entire communication
Solution Approach 2:
The patent merges multiple communication links from different satellites into a unified secure communication channel. The ground terminal combines the individual beam responses through signal processing and data reassembly, creating a composite communication stream that benefits from the security and reliability of multiple independent paths while presenting a single integrated interface to the user
3Productivity
If multiple satellites in a cluster are used with multibeam VSAT, then bandwidth utilization and data privacy are enhanced, but the device complexity increases
Solution Approach 1:
The ground terminal incorporates automated satellite selection and beam management systems that self-adjust to optimize communication. The terminal automatically tracks satellite positions, selects the optimal subset of satellites based on current conditions, and dynamically allocates beams without requiring manual intervention. This self-service capability manages the increased device complexity while maintaining high bandwidth utilization
Solution Approach 2:
The system dynamically changes operational parameters such as beam directions, satellite selection, and power allocation based on real-time conditions. The ground terminal adjusts these parameters automatically to optimize bandwidth utilization across the satellite cluster, managing complexity through adaptive parameter control rather than fixed complex configurations
4Productivity
If satellites in slightly inclined GSO orbits are used, then bandwidth effectiveness is improved through multiple folds re-usage, but the satellite movement requires dynamic tracking
Solution Approach 1:
The patent embraces the dynamic nature of slightly inclined GSO satellite orbits by implementing a ground terminal with dynamic beam tracking capability. The system continuously adjusts beam directions to follow satellite movements, and dynamically selects and switches between satellites in the cluster. This dynamic adaptation allows the system to fully utilize the bandwidth potential of moving satellites without requiring complex mechanical tracking mechanisms, as the electronic beam steering provides agile, software-controlled tracking
Data Source
AI summary
A source terminal, for communications with a destination terminal via satellite links to two clusters of satellites, comprises a transmitter and a multibeam antenna system. The transmitter includes a preprocessor and a bank of modulators. The preprocessor performs a K-muxing transform, which has an inverse transform, on M concurrent input data streams to generate concurrently M output data streams, M>1. Each output data stream is a linear combination of the M concurrent input data streams. The bank of modulators transforms N of the M output data streams into N signal streams, N≤M. The multibeam antenna system transforms the N signal streams into N shaped beams and radiating N1 of the N shaped beams towards the first cluster of satellites and N2 of the N shaped beams towards the second cluster of satellites, where N1 and N2 are positive integers and N1+N2=N.