Calibration of GNSS Adaptive Antennas

C.M. Church, I.J. Gupta

Abstract:	We present a measurement procedure to obtain in situ manifolds of GNSS adaptive antennas equipped with space-time adaptive processor (STAP). The procedure is an extension of the calibration method used for fixed reception pattern antennas. In the procedure, various combinations of STAP weights are selected, and the corresponding code delay and cross correlation function value at that delay are measured. These measurements are then used in a set of linear equations to solve for the antenna frequency domain response in the satellite direction. The accuracy of the measurement procedure is established by computer simulations where the procedure is used to estimate the manifolds of a seven element antenna mounted on a model aircraft. The estimated antenna manifolds are compared with the true in situ manifolds of the antenna. We also demonstrate the effectiveness of the procedure by comparing the estimated code and carrier phase biases to the true antenna-induced biases in the presence of interfering signals.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	344 - 350
Cite this article:	Church, C.M., Gupta, I.J., "Calibration of GNSS Adaptive Antennas," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 344-350.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In