Title :
Accuracy of 2-Dimensional Object Location Estimation Using Leaky Coaxial Cables
Author :
Inomata, Kenji ; Yamaguchi, Yashio ; Yamada, Hiroyoshi ; Tsujita, Wataru ; Shikai, Masahiro ; Sumi, Kazuhiko
Author_Institution :
Mitsubishi Electr. Corp., Amagasaki, Japan
fDate :
6/1/2011 12:00:00 AM
Abstract :
The improvement of position estimation accuracy is a very important factor in various radar applications. This paper focuses on two-dimensional (2-D) location estimation in radar surveillance using leaky coaxial cables. A leaky coaxial cable is a kind of antenna and has recently attracted attention as a powerful tool for vehicle detection and as an intrusion detection sensor for perimeter security. We derive the Cramér-Rao bound (CRB) for a leaky coaxial cable sensing application and introduce the CRB ellipsoid to evaluate the accuracy of the 2-D location estimation of an object. The diameter and angle of a CRB ellipsoid indicates its error distribution. A leaky coaxial cable has an outer conductor with periodic slots. Its slot pattern determines the radiation characteristics such as the beam angle and harmonic radiation. We focus on the slot pattern to improve the estimation accuracy. Numerical analyses show that a slot pattern generating multi-beams improves the accuracy while single radiation is preferred for general use in communication applications.
Keywords :
antenna radiation patterns; coaxial cables; numerical analysis; radar applications; CRB ellipsoid; Cramer-Rao bound; error distribution; harmonic radiation; intrusion detection sensor; leaky coaxial cable sensing application; numerical analysis; perimeter security; position estimation accuracy; radar applications; radar surveillance; two-dimensional object location estimation; vehicle detection; Accuracy; Coaxial cables; Ellipsoids; Harmonic analysis; Maximum likelihood estimation; Sensors; Cramér-Rao; estimations; leaky coaxial cable; location;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2143661