NDLI: Unitary Cyclic MUSIC for Direction Finding in GPS Receivers

Content Provider	IEEE Xplore Digital Library
Author	Sahmoudi, M. Amin, M.G.
Copyright Year	2006
Description	Author affiliation: Lab. for Wireless Commun. & Positioning, Villanova Univ., PA (Sahmoudi, M.; Amin, M.G.)
Abstract	Several anti-jam techniques for GPS receivers rely on the direction-of-arrival (DOA) of the satellite signals. These angles change with moving GPS receiver platforms and, as such, they should be constantly estimated for the purpose of jammer nulling and beamforming. In this paper, we propose a new approach for directional finding for multi-antenna GPS receivers. This approach is based on a new unitary-cyclic subspace method, which utilizes the modulation and repetition properties of the GPS code to discriminate against jammer signals. We apply the forward-backward spatial smoothing technique to the cyclic array covariance matrix to decorrelate the direct path from multipath, so nulling of the undesired signals can occur. A unitary formulation is considered for real-valued eigendecomposition which aims at reducing the payload in the GPS receivers. Simulations are provided showing that the proposed approach has better performance than existing high-resolution methods that neither apply cyclostationary or unitary transformations for DOA estimation
Starting Page	70
Ending Page	73
File Size	168963
Page Count	4
File Format	PDF
ISBN	1424403081
DOI	10.1109/SAM.2006.1706093
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiple signal classification Global Positioning System Direction of arrival estimation Jamming Satellites Array signal processing Modulation coding Smoothing methods Covariance matrix Decorrelation
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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