On the Detection Probability of Parallel Code Phase Search Algorithms in GPS Receivers

TitleOn the Detection Probability of Parallel Code Phase Search Algorithms in GPS Receivers
Publication TypeConference Paper
Year of Publication2010
AuthorsGeiger, B., Soudan M., & Vogel C.
Conference NameInt. Sym. on Personal, Indoor and Mobile Radio Communications (PIMRC)
Pages865 - 870
Date PublishedSep
Conference LocationIstanbul
Abstract

The first stage of the signal processing chain in a Global Positioning System (GPS) receiver is the acquisition, which provides for a desired satellite coarse code phase and Doppler frequency estimates to subsequent stages. Thus, acquisition is a two-dimensional search, implemented as demodulation and non-coherent correlation. For a certain Doppler estimate, software-defined GPS receivers typically compute the correlation for all time lags in parallel. One way to detect the presence of a signal is by comparing the ratio between the largest and the second largest correlation peak against a threshold. For this type of receivers, the detection and false alarm probabilities are derived. Interestingly, the false alarm probability is independent of the noise power spectral density, which allows a fixed threshold setting. The analytic results are verified by a series of simulations.

DOIhttp://dx.doi.org/10.1109/PIMRC.2010.5672040
Citation KeyID53442
Refereed DesignationRefereed
SPSC cross-references
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