NDLI: Joint DOA estimation and multi-user detection for WCDMA using DELSA

Content Provider	IEEE Xplore Digital Library
Author	Balakrishnan, R.D. Nugroho, B. Hyuck Kwon Seung Min Dong Kang
Copyright Year	2004
Description	Author affiliation: Wichita State Univ., KS, USA (Balakrishnan, R.D.; Nugroho, B.; Hyuck Kwon)
Abstract	We propose an algorithm to perform jointly the azimuthal direction-of-arrival (DOA) estimation and multi-user detection (MUD) of signals that impinge an array of antennas. We treat DOA estimation and MUD as an inverse problem of finding specific sets of parameters, viz., {/spl phi//sub i/} and the corresponding {s/sub i/}. We reformulate this nonlinear estimation problem into a highly underdetermined linear system. We solve the resulting least squares problem by employing the well-known conjugate gradients (CG) iterations on the normal equations (NE). From the solution, we recover the DOA and detect the desired user information, thereby achieving joint DOA estimation and multi-user detection. Simulation results for a typical 3GPP WCDMA demonstrate the robustness of our algorithm in the regimes of low signal-to-noise ratios (SNRs), fast fading and closely spaced interferences.
Starting Page	879
Ending Page	884
File Size	615501
Page Count	6
File Format	PDF
ISBN	0780384083
DOI	10.1109/ISSSTA.2004.1371827
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-08-30
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Direction of arrival estimation Multiuser detection Multiaccess communication Signal detection Antenna arrays Directive antennas Inverse problems Linear systems Least squares methods Character generation
Content Type	Text
Resource Type	Article

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