NDLI: COD: blind path separation with limited antenna size

Content Provider	IEEE Xplore Digital Library
Author	Xinying Zhang Kung, S.-Y.
Copyright Year	2001
Description	Author affiliation: Princeton Univ., NJ, USA (Xinying Zhang)
Abstract	This paper proposes a generalized multipath separability condition for subspace processing and derives a novel COD (combined oversampling and displacement) algorithm to utilize both spatial and temporal diversities for path separation and DOA estimation. A unique advantage lies in its ability to cope with the situation where the number of multipaths is much larger than that of antenna elements, which arises in many practical situations. The traditional data matrix or any of its horizontally expanded versions cannot yield a sufficient matrix rank to satisfy the condition, when there is antenna deficiency. Neither can a vertical expansion via oversampling, except when there is no overlapping among intra-user paths (a much stronger condition than the asynchrony condition). The COD strategy solves the antenna deficiency problem by combining vertical expansion with temporal oversampling and horizontal expansion with spatial displacement. Another unique advantage of COD is its multiplicity of eigenvalues which greatly facilitates the later signal recovery processing. The paper first analyzes the theoretical footings for COD and follows with some illustrative simulation results in noisy channels.
Sponsorship	IEEE Signal Process. Soc
Starting Page	2945
Ending Page	2948
File Size	378022
Page Count	4
File Format	PDF
ISBN	0780370414
ISSN	15206149
DOI	10.1109/ICASSP.2001.940266
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-05-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Direction of arrival estimation Receiving antennas Signal processing Linear antenna arrays Diversity reception Eigenvalues and eigenfunctions Analytical models MIMO Antenna arrays Multiple signal classification
Content Type	Text
Resource Type	Article

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