Reduced Complexity Circuits for Serial Code Phase Search Acquisition

Gianmarco Girau, Letizia Lo Presti, Maurizio Fantino

Abstract:	This paper describes an evolution of the method proposed in [1] for reducing the complexity of the serial code phase synchronization for Direct-Sequence Spread Spectrum communications. The method is based on the grouping and pre-calculation of intermediate sums on the input signal. Thanks to an alternative explanation of the working principle introduced in [1], specific issues and interesting properties emerge from the method. They are treated in detail in the paper and they cover topics such as the implementation of active and passive correlation schemes, the behaviour of the method in presence of coherent integration over multiple code periods and the simultaneous acquisition of different Pseudo Random Noise (PRN) codes. After that an hardware implementation of the method is discussed. The circuit is an extension of the Code Matched Filter (CMF) scheme with some differences with respect to the scheme presented in [1].
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	174 - 182
Cite this article:	Girau, Gianmarco, Presti, Letizia Lo, Fantino, Maurizio, "Reduced Complexity Circuits for Serial Code Phase Search Acquisition," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 174-182.
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