Webinar: Signal Quality Monitoring Based on Chip Domain Observables: Theory, Design, and Implementation

Thursday, March 9, 9:00 a.m. EST
Prof. Xiaowei Cui and Prof. Mingquan Lu


Signal quality monitoring (SQM) is a technique utilized by satellite- and ground-based augmentation systems (SBAS/GBAS) to detect potential hazardous deformations in signals and better protect integrity for safety-critical users. The next generation of SBASs will incorporate dual-frequency multi-constellation (DFMC) techniques, for which SQM is particularly important since signal deformations might be the largest source of uncertainty in ranging error after first-order ionospheric delays are eliminated. However, the performance bounds of the traditional multi-correlator-based SQM technique face some challenges because of the raised requirement on detection sensitivity by dual-frequency ionosphere-free measurements and multiple modulation modes of civilian signals from multi-constellation techniques. To mitigate the challenges and improve overall performance, SQM based on chip domain observables (CDOs) is emerging, but has not yet been systematically studied. We propose a design methodology for CDO-based SQM, consisting of derivations and corresponding massive simulations. Correctness and effectiveness are assessed to confirm the methodology, and a simplification process by checking the sensitivity of CDOs is demonstrated in terms of implementation.


The full paper can be accessed for free at:https://navi.ion.org/content/69/4/navi.543


Wang, Xiang, Cui, Xiaowei, Liu, Gang, Wei, Kefan, Lu, Mingquan (2022). Signal Quality Monitoring Based on Chip Domain Observables: Theory, Design, and Implementation. NAVIGATION: 69(4). https://navi.ion.org/content/69/4/navi.543

Webinar Recording: