Correlation Losses and Interference Rejection Due to Quantization in CBOC Receivers

F.M.G. Sousa, F.D. Nunes, J.M.N. Leitão

Abstract:	A joint design activity involving experts from the United States and Europe recommended an optimized multiplexed Binary Offset Carrier (BOC) modulation for the modernized civil GPS signal and the Galileo E1 Open Service signal. Implementation losses in a GNSS receiver depend on the sampling rate, the quantization process and the precorrelation bandwidth. These parameters are related and have a combined effect. This work analyzes: the correlation loss due to the limited front-end bandwidth; and the signal-tonoise ratio degradation caused by multi-bit precorrelation quantization in composite BOC receivers. The required automatic gain control process to lower quantization loss is also discussed.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	3234 - 3241
Cite this article:	Sousa, F.M.G., Nunes, F.D., Leitão, J.M.N., "Correlation Losses and Interference Rejection Due to Quantization in CBOC Receivers," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 3234-3241.
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