A Multifrequency Low-Cost Architecture for GNSS Software Receivers

Danilo F.M. Cristaldi, Davide Margaria, Letizia Lo Presti

Abstract:	In this paper we propose an innovative multifrequency and low-cost Software Defined Radio receiver architecture able to track new and/or modernized Global Navigation Satellite System (GNSS) signals, focusing on GPS L5 (at the moment transmitted only from IIR-20M GPS satellite, SVN 49, PRN 63). The main advantages of the proposed architecture are: · the presence of a single Analog-to-Digital Converter (ADC), which means having a simple and low-cost front-end able to receive multiple GNSS signals in a unique data stream; · the flexibility and the interoperability among two or more bands and different systems. This approach paves the way for an easy design of novel receiver algorithms, leading to better performance, robustness and reconfigurability at the cost of an increased computational burden. In detail it allows the implementation of aiding strategies able to exploit the acquisition of a simple signal (e.g. GPS L1 C/A) for aiding the acquisition of another more complex signal (e.g. L5), or the development of novel “smart” tracking algorithms. Complete analysis results related to the proposed architecture are presented in the paper, performing validations and tests with GNSS signals from different bands (L5 and L1). In addition, a further validation using real signal samples collected with a demonstrative frontend is presented.
Published in:	Proceedings of the 2010 International Technical Meeting of The Institute of Navigation January 25 - 27, 2010 Catamaran Resort Hotel San Diego, CA
Pages:	679 - 687
Cite this article:	Cristaldi, Danilo F.M., Margaria, Davide, Presti, Letizia Lo, "A Multifrequency Low-Cost Architecture for GNSS Software Receivers," Proceedings of the 2010 International Technical Meeting of The Institute of Navigation, San Diego, CA, January 2010, pp. 679-687.
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