NDLI: Antenna Geometry Conditions for MIMO Radar With Uncoupled Direction Estimation

Content Provider	IEEE Xplore Digital Library
Author	Haowen Chen Xiang Li Zhaowen Zhuang
Copyright Year	1963
Abstract	We mainly focus on the role played by the antenna geometry in the direction estimation performance for a direction finding (DF) bistatic multiple-input multiple-output (MIMO) radar. First, we introduce the signal and the noise models which satisfy the space-time separability conditions. Then, we derive an expression of the Cramér-Rao lower bound (CRLB) on target parameters with the antenna locations for a single point target in the far-field scenario. We show that, under the space-time separability conditions, the temporal dimension parameters (range and range rate) and spatial dimension parameters [direction-of-departure (DOD) and the direction-of-arrival (DOA)] are uncoupled. We also show that DOD and DOA are uncoupled because of their spatial independence. In addition, we derive a set of the necessary and sufficient geometrical constraints for the uncoupled direction estimation which is based on the diagonal Fisher information matrix (FIM). We present that, when both the transmit and the receive antenna location parameters have equivalent auto-moment-of-inertia tensors of x and y axes, and zero cross-moment-of-inertia tensors of x, y and z axes, the bistatic MIMO radar system with uncoupled direction estimation can be obtained. The corresponding conditions are extended to monostatic MIMO radar case for their commonness of the colocated antenna geometry. In numerical example section, we show several representative antenna geometries to illustrate the antenna geometry conditions derived in this paper.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	3455
Ending Page	3465
Page Count	11
File Size	3498446
File Format	PDF
ISSN	0018926X
Volume Number	60
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receiving antennas MIMO radar Estimation Radar antennas Geometry Directive antennas Noise uncoupled direction estimation Antenna geometry conditions Cramér–Rao lower bound (CRLB) direction-of-arrival (DOA) direction-of-departure (DOD) multiple-input multiple-output (MIMO) radar
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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Antenna Effects on a Monostatic MIMO Radar for Direction Estimation, a Cramèr-Rao Lower Bound Analysis

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