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IEEE Transactions on Antennas and Propagation
Volume 47 Number 3, March 1999

Table of Contents for this issue

Complete paper in PDF format

Receiver Array Calibration Using Disparate Sources

Ishan Samjeva Daniel Solomon, Member, IEEE, Douglas A. Gray, Member, IEEE, Yuri I. Abramovich, Member, IEEE, and Stuart J. Anderson

Page 496.

Abstract:

In this paper, we present a new array calibration procedure for over-the-horizon (OTH) radar, using disparate sources. Unlike previous array calibration methods, which require a specific type or class of sources for calibrating the array, the method we propose can use combinations of single-mode, multimode, and near-field sources; each source with either known or unknown DOA's (directions-of-arrival). Multidimensional MUSIC is exploited for time-invariant DOA sources, while single-snapshot techniques are used for sources that have time-varying DOA's. A nonlinear separable least-squares solution to the array calibration problem is used to estimate the array coupling matrix and sensor positions. Simulation results indicate that good estimates are obtained for the unknown parameters and further the array sidelobe levels and bearing errors are significantly reduced when these estimated parameters are used in array processing. The algorithm performance was also compared with the Cramer-Rao lower bound and found to be statistically efficient.

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