GPS multi-receiver direct position estimation for aerial applications

Global Navigation Satellite System (GNSS);Global Positioning System (GPS);Direct Positioning;Maximum Likelihood Estimation;GNSS receiver, Multi-Receiver

Chu, Arthur Hsi-Ping ; Gao ; Grace X

关键词: Global Navigation Satellite System (GNSS);    Global Positioning System (GPS);    Direct Positioning;    Maximum Likelihood Estimation;    GNSS receiver, Multi-Receiver;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/101449/CHU-THESIS-2018.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Modern aviation safety increasingly depends on reliable GPS services, while signal degrading effects such as multipath and masking often occur during critical flight phases, such as take-off and landing.In this regard, we propose Multi-Receiver Direct Position Estimation (MR-DPE), which operates a network of DPE receivers to enhance GPS measurement certainty in degraded signal environments.A DPE receiver directly estimates navigation solutions in the PVT domain with a maximum-likelihood approach, bypassing the intermediate range measurements.Whereas prior works have shown the enhanced measurement certainty of DPE under weak signals, MR-DPE provides further improvement by leveraging the information redundancy and the geometric diversity provided by the network of receivers and antennas.We implemented MR-DPE using software-defined radio and conducted comprehensive, full-scale flight experiments, a first for DPE-related works.A wide range of flight profiles were explored, especially those prone to signal multipath and masking, and preliminary analyses were performed on the data collected to ensure the conceptual validity of MR-DPE.