H-infinity Controller Design for GPS Receiver Tracking Loop

He-Sheng Wang, Hung-Sheng Wu and Shang-Wei Chen

Abstract:	In this paper, the application of H-infinity optimal control theory to GPS (Global Positioning System) receiver tracking loops is investigated. We design an H-infinity controller for the receiver tracking loop. The H-infinity controller is particularly attractive because it is a robust design in the sense that small disturbances lead to small tracking errors. Furthermore, it easily accommodates the inclusion of plant uncertainties as part of the plant model. By adding unstructured or structured perturbations to the plant model, it is possible to design controller that ensure stability robustness and performance robustness of the closed-loop system. In order to apply the H-infinity optimal design, we first rewrite the GPS receiver tracking loop into a two-input two-output generalized plant model. By using a software-based GPS L5 signal generator, various levels of disturbances are derived as test inputs to evaluate the performance of the resulting tracking loop.
Published in:	Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004) September 21 - 24, 2004 Long Beach Convention Center Long Beach, CA
Pages:	510 - 522
Cite this article:	Wang, He-Sheng, Wu, Hung-Sheng, Chen, Shang-Wei, "H-infinity Controller Design for GPS Receiver Tracking Loop," Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004), Long Beach, CA, September 2004, pp. 510-522.
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