Dynamic Antenna Platform Offset Calibration for Mobile Satcom
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Solution Overview
Problem
Mobile satellite communication systems face pointing errors due to antenna platform misalignment, leading to inefficient resource usage and compliance issues with regulatory requirements, as existing correction methods do not adequately address misalignment across all beam directions and often require dedicated calibration routines that disrupt user communications.
Innovation Solution
A dynamic antenna platform offset calibration method that communicates user data during travel segments to determine antenna pointing offsets based on signal characteristics, allowing for continuous calibration across various spatial conditions without the need for dedicated calibration routines or disruptive communication interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mispointing correction operations are performed to compensate for pointing error, then communication quality is improved, but user communications are inhibited due to dedicated calibration routine requirements
Solution Approach 1:
The patent combines the calibration function with normal user communication operations by integrating inertial measurement unit data with communication signal processing. This allows the system to perform pointing error compensation continuously during user communications rather than requiring separate calibration routines, thereby maintaining both communication quality and user communication efficiency
Solution Approach 2:
The system implements continuous pointing error compensation by constantly processing inertial measurement data alongside communication signals. This continuous operation eliminates the need for periodic dedicated calibration routines that would interrupt user communications, ensuring uninterrupted useful action while maintaining accurate beam pointing
2Measurement precision
If mispointing correction operations are performed to compensate for antenna platform misalignment, then beam pointing accuracy is improved, but the system requires dedicated calibration routines that inhibit user communications
Solution Approach 1:
The system performs preliminary alignment by using inertial measurement unit data to pre-compensate for platform motion before communication signals are affected by pointing errors. This preliminary action based on inertial data reduces the need for subsequent correction operations and eliminates dedicated calibration routines that would cause communication interruptions
Solution Approach 2:
The inertial measurement unit serves as an intermediary that provides advance information about platform orientation and motion. This intermediary data allows the system to proactively adjust beam pointing based on predicted platform position rather than reacting to communication signal quality degradation, eliminating the need for time-consuming dedicated calibration routines
3Reliability
If conventional mispointing correction methods are used, then pointing error is compensated in limited beam directions, but correction effectiveness deteriorates across all beam directions
Solution Approach 1:
The system implements a universal pointing error compensation mechanism that processes inertial measurement data to generate correction applicable to all beam directions simultaneously. Rather than direction-specific correction, the inertial-based approach provides omnidirectional validity, making the compensation effective regardless of the satellite's position relative to the mobile platform
Data Source
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AI summary
Systems and methods are described for supporting dynamic antenna platform offset calibration for an antenna system mounted to a mobile vehicle. In particular, dynamic antenna platform offset calibration can be performed while communicating user data associated with the mobile vehicle (e.g., based at least in part on alignment calibration procedures including measurements of user data signals), with an antenna platform offset being updated when alignment calibration procedures have been performed at suitably separated spatial conditions. Accordingly, antenna platform offset calibration may be performed throughout the operation of the mobile vehicle without requiring that the vehicle be proactively aligned in a particular orientation for a dedicated calibration routine prior to using the antenna for communicating user data during normal operation of the mobile vehicle.