A Novel GPS Initial Synchronization Scheme using Decomposed Differential Matched Filter

Sang Hyun Park, Il Heung Choi, Sang Jeong Lee, and Young Baek Kim

Abstract:	The initial synchronization scheme using the matched filter is known to have smaller mean acquisition time than the initial synchronization scheme using the serial correlator. However, most GPS initial synchronization schemes are implemented using the serial correlator because the serial correlator needs simpler hardware than the matched filter. In this paper, a novel GPS initial synchronization scheme is proposed to reduce the hardware complexity of the matched filter. The proposed method is implemented by the decomposed differential matched filter having 25% M&A of the conventional matched filter. This paper also presents the generalized mean acquisition time of the initial synchronization scheme with multiple correlator. In addition, it is shown that the proposed method has the equal performance to the conventional method in spite of reduced hardware complexity. The performance of the proposed method is verified by post-processing GPS signals of various strength. Finally, it is shown that the proposed method prevents the squaring loss of non-coherent integration.
Published in:	Proceedings of the 2002 National Technical Meeting of The Institute of Navigation January 28 - 30, 2002 The Catamaran Resort Hotel San Diego, CA
Pages:	246 - 253
Cite this article:	Park, Sang Hyun, Choi, Il Heung, Lee, Sang Jeong, Kim, Young Baek, "A Novel GPS Initial Synchronization Scheme using Decomposed Differential Matched Filter," Proceedings of the 2002 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2002, pp. 246-253.
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