On the Power Spectral Density of GNSS Signals, with Applications

John W. Betz

Abstract:	This paper provides the analytical tools for computing exact and approximate power spectra for GNSS signal components. It provide a unifying set of expressions for the power spectral densities of keyed signal components used for GNSS, accounting for various spreading modulations, nonrepeating and repeating spreading codes, overlay codes, presence or absence of data, arbitrary spreading symbol shapes, time division multiplexing of pilot and data components, and time-multiplexing of different spreading symbol shapes. For signal components having a single spreading symbol type, the fundamental expression for the power spectral density is the product of four factors, each related to a distinct part of the signal design: data message, overlay code, spreading code, spreading symbol, and these factors can be examined separately for different types of signal designs. These analytical results are applied to explore variations of the C/A code signal that enhance its power spectral density.
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:	859 - 871
Cite this article:	Betz, John W., "On the Power Spectral Density of GNSS Signals, with Applications," Proceedings of the 2010 International Technical Meeting of The Institute of Navigation, San Diego, CA, January 2010, pp. 859-871.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In