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Updated: Mar 29, 2026
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Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
Published on: December 12, 2013
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High-Accuracy Wave Direction Estimation Using Kalman Fusion of Interferometric Measurements and Energy Field
Caicheng Wang1, Xue Li2, Linshan Xue3
1School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China.
Sensors (Basel, Switzerland)
|March 28, 2026
Summary
This study introduces a dual-link beam pointing system for space solar power stations, improving microwave wireless power transfer efficiency. The integrated framework enhances tracking accuracy and corrects biases for reliable energy transmission.
Area of Science:
- Space Engineering
- Wireless Power Transfer
- Control Systems
Background:
- Space Solar Power Stations (SSPS) require precise beam pointing for efficient Microwave Wireless Power Transfer (MWPT).
- Platform motion and disturbances challenge maintaining effective aperture coupling and transmission efficiency.
Purpose of the Study:
- To propose a dual-link beam pointing estimation framework for SSPS MWPT.
- To integrate interferometric Angle-of-Arrival (AoA) measurements with energy-field reconstruction for robust pointing estimation.
- To provide practical guidelines for SSPS MWPT system design.
Main Methods:
- A dual-link framework fusing guidance-link interferometric AoA measurements and power-link energy-field reconstruction.
- Development of a Kalman filter (KF) to fuse asynchronous, multi-rate measurements for closed-loop beam control.
- Establishment of a sensitivity model to quantify angular error impact on capture efficiency.
Main Results:
- Achieved azimuth and elevation Root Mean Square Errors (RMSEs) of 0.0069° and 0.006°.
- Significantly reduced high-frequency pointing fluctuations.
- Improved expected efficiency from ~0.988/0.998 to nearly unity using the fusion method.
Conclusions:
- The proposed dual-link fusion method offers continuous and robust pointing estimates for SSPS MWPT.
- Quantitative accuracy thresholds derived provide practical design guidelines for achieving desired efficiencies.
- The framework significantly enhances MWPT efficiency and reliability in space applications.
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