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Reduction of Kinematic Short Baseline Multipath Effects Based on Multipath Hemispherical Map
Miaomiao Cai1, Wen Chen2,3, Danan Dong4,5
1Engineering Center of SHMEC for Space Information and GNSS, East China Normal University, Shanghai 200241, China. mmcai@outlook.com.
Sensors (Basel, Switzerland)
|October 19, 2016
Summary
Multipath mitigation using the Multipath Hemispherical Map (MHM) approach effectively reduces errors in static and kinematic environments. This method significantly improves baseline length accuracy and residual values for navigation systems.
Area of Science:
- Geodesy and Geomatics
- Navigation Systems Engineering
Background:
- Multipath effects degrade the accuracy of navigation systems, particularly in static environments.
- The Multipath Hemispherical Map (MHM) approach leverages spatial repeatability for multipath mitigation.
- Previous research validated MHM's effectiveness in static conditions.
Purpose of the Study:
- To extend and validate the Multipath Hemispherical Map (MHM) approach for kinematic shipborne environments.
- To assess the performance improvements of MHM in both static and dynamic scenarios.
- To analyze factors influencing MHM performance, such as spatial coverage and resolution.
Main Methods:
- Implementation of the MHM approach in a shipborne kinematic testing environment.
- Conducting comparative static and kinematic tests to evaluate MHM's efficacy.
- Utilizing power spectrum analysis to examine multipath mitigation across different frequency bands.
Main Results:
- MHM reduced root mean square (RMS) baseline length deviations by approximately 10.5% in static and kinematic tests.
- RMS residual values decreased by 39.89% (static) and 21.91% (kinematic) after MHM mitigation.
- MHM demonstrated higher effectiveness in mitigating low-frequency multipath; high-frequency components remained similar to observation noise.
Conclusions:
- The Multipath Hemispherical Map (MHM) approach is feasible and effective for multipath mitigation in kinematic shipborne environments.
- MHM significantly enhances navigation accuracy by reducing baseline length and residual errors.
- Further research into spatial coverage and resolution can optimize MHM performance for kinematic platforms.
