Satellite Beam Acquisition Prediction for Communication Devices
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Solution Overview
Problem
User terminals struggle to accurately interpret satellite messages due to environmental factors, leading to increased workload and inefficiency in beam scanning, especially in low earth orbit satellite communication systems without GPS or TLE information, and environmental interference affects beam acquisition confidence.
Innovation Solution
A communication method and device that determines the need for target beams and generates satellite trajectory information estimates using historical data, reducing beam search workload by predicting optimal beams based on GPS and TLE information, and enhancing beam acquisition and tracking through Kalman filters and machine learning techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user terminal performs full beam scanning to acquire satellite communication signals, then the beam acquisition coverage is improved, but the workload of the baseband module and radio frequency module increases significantly
Solution Approach 1:
The patent applies preliminary action by using GPS information and TLE information to predict satellite trajectory and pre-determine target beams before actual beam scanning. This allows the system to prepare beam acquisition in advance based on predicted satellite positions, reducing the need for exhaustive full beam scanning and thereby lowering the workload of the baseband and radio frequency modules while maintaining reliable beam acquisition coverage.
2Reliability
If the user terminal performs full beam scanning without GPS or TLE information, then the beam acquisition is possible, but the search time and system efficiency deteriorate
Solution Approach 1:
The system performs preliminary satellite trajectory prediction using GPS information and TLE information to determine target beams in advance. This preliminary action enables the terminal to skip time-consuming full beam scanning by directly focusing on predicted satellite positions, thereby maintaining beam acquisition capability while significantly reducing search time and improving system efficiency.
Solution Approach 2:
The patent implements feedback mechanisms where the system continuously monitors satellite trajectory information and updates target beam predictions based on actual satellite positions. This feedback loop allows the system to adapt to changing conditions while maintaining efficient beam acquisition, reducing the need for exhaustive scanning even when environmental factors affect signal quality.
3Measurement precision
If the system uses GPS information and TLE information for satellite trajectory prediction, then the beam acquisition accuracy is improved, but the system becomes vulnerable to environmental factors such as rain and thunder
Solution Approach 1:
The system employs feedback mechanisms to continuously monitor and update satellite trajectory information. When environmental factors such as rain or thunder affect signal quality and reduce the accuracy of GPS or TLE information, the feedback loop detects these conditions and triggers beam scanning or trajectory re-estimation, allowing the system to maintain reliable beam acquisition despite environmental interference.
Solution Approach 2:
The patent applies beforehand cushioning by preparing alternative beam acquisition strategies in advance. When GPS or TLE information becomes unreliable due to environmental factors, the system has pre-planned fallback mechanisms such as switching to beam scanning modes or using alternative trajectory estimation methods, ensuring continuous operation and maintaining system robustness against environmental disruptions.
4Measurement precision
If the user terminal continuously monitors satellite trajectory information to maintain accurate beam tracking, then the beam tracking precision is improved, but the energy consumption and computational load increase
Solution Approach 1:
The system implements periodic action by updating satellite trajectory information and re-evaluating target beams at predetermined time intervals or when specific conditions are met, rather than continuously monitoring. This periodic approach maintains adequate beam tracking precision for most conditions while significantly reducing energy consumption and computational load compared to continuous monitoring, balancing performance with resource efficiency.
Data Source
AI summary
The present application discloses a communication device and a communication method. The communication method includes: determining whether there exists a current need to decide at least one target beam to determine whether to receive a satellite payload communication signal from a satellite payload by the at least one target beam; and determining whether a current satellite trajectory information is expired to decide whether to generate a current satellite trajectory information estimate. The user terminal controls its antenna to communicate with the satellite payload.