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Characterization of Signal Quality Monitoring Techniques for Multipath Detection in GNSS Applications.
Ali Pirsiavash1, Ali Broumandan2, Gérard Lachapelle3
1Position, Location and Navigation (PLAN) Group, Schulich School of Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada. ali.pirsiavash@ucalgary.ca.
Sensors (Basel, Switzerland)
|July 6, 2017
Summary
Signal Quality Monitoring (SQM) effectively detects medium to long-delay multipath errors but struggles with short-delay multipath. Its mitigation effectiveness depends on tracking strategy and signaling schemes.
Area of Science:
- Navigation Systems
- Signal Processing
- Geomatics Engineering
Background:
- Multipath interference degrades the accuracy of navigation signals.
- Signal Quality Monitoring (SQM) techniques are crucial for assessing signal integrity.
Purpose of the Study:
- To analyze the performance of SQM techniques in various multipath environments.
- To evaluate the sensitivity and effectiveness of SQM for multipath detection and mitigation.
Main Methods:
- Investigated SQM variation profiles and multipath error envelopes.
- Compared SQM performance using narrow and high-resolution correlator techniques for BPSK(1) and BOC(1,1) signals.
- Analyzed data from static and kinematic scenarios.
Main Results:
- SQM shows sensitivity to medium and long-delay multipath.
- Mitigation effectiveness for medium/long delays varies with tracking strategy and signaling scheme.
- Short-delay multipath effects are often undetected by SQM due to low sensitivity.
Conclusions:
- SQM is a valuable tool for multipath assessment but has limitations, particularly for short-delay interference.
- Optimizing tracking strategies and signaling schemes can enhance SQM's multipath mitigation capabilities.
Keywords:
global navigation satellite systems (GNSS)multipath detectionnavigation reliability and integritysignal processingsignal quality monitoring (SQM)More Related Videos
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