The Effects of I/Q Imbalance and Complex Filter Mismatch on GPS/Galileo System

Pei-Hsueh Lee,Ho-Ching Chao, Wei-Lung Mao, Hen-Wai Tsao and Fan-Ren Chang

Abstract:	As global navigation satellite systems thrive recently, there are urgent need and demand for integrated modeling of analog circuits such that the system performance can be predetermined. This paper analyzes the errors of mixers and complex filters within the analog front-end, and describes their effects of nonidealities on image rejection, which is an important indicator for the signal quality. It has shown the design considerations for complex filters must take account of not only the out-of-band attenuation but also the components instabilities per se as well. Besides, unavoidable I/Q imbalance of analog mixers exacerbates the situation, hence it is useful to acquire the design tolerance in advance for both mixers and complex filters.
Published in:	Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007) September 25 - 28, 2007 Fort Worth Convention Center Fort Worth, TX
Pages:	543 - 550
Cite this article:	Lee, Pei-Hsueh, Chao, Ho-Ching, Mao, Wei-Lung, Tsao, Hen-Wai, Chang, Fan-Ren, "The Effects of I/Q Imbalance and Complex Filter Mismatch on GPS/Galileo System," Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007), Fort Worth, TX, September 2007, pp. 543-550.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In