Extended Replica Folding for Direct Acquisition of GPS P-Code And Its Performance Analysis

Chun Yang, James Chaffee, Jonathan Abel and Juan Vasquez

Abstract:	The Global Positioning System (GPS) precision code (P- code) was not originally designed for direct acquisition per se, but rather through the hand-over from its corresponding acquired coarse acquisition code (C/A code). Attempts have been made to design direct acquisition methods that do not first acquire C/A code by utilizing massive physical correlators in parallel for code search. In contrast to this “hard” parallelism, this paper considers the “soft” parallelism in which fast algorithms run over the same segment of data many times to cover all search parameters. As a continuation of our previous papers presented at ION- GPS’99 [Yang, Vasquez, and Chaffee, 1999a; 1999b], which introduced the novel concept of extended replica- folding technique, this paper presents the statistical analysis and computer simulation as means to quantify the performance of the technique.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	2070 - 2078
Cite this article:	Yang, Chun, Chaffee, James, Abel, Jonathan, Vasquez, Juan, "Extended Replica Folding for Direct Acquisition of GPS P-Code And Its Performance Analysis," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 2070-2078.
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