Noise MIMO radar - co-array cross-spectral and cross-covariance matrices

Authors:
Douglas A. Gray;Rowan Fry
Affiliations:
University of Adelaide Radar Research Centre, School of Electrical and Electronic Engineering, University of Adelaide, Adelaide, Australia;University of Adelaide Radar Research Centre, School of Electrical and Electronic Engineering, University of Adelaide, Adelaide, Australia
Venue:
Digital Signal Processing
Year:
2011

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Abstract

An expression for the cross-spectral matrix of the co-array of an element space noise MIMO radar is derived and then used to determine the output power in various noise fields using both conventional and MVDR beamforming. Theoretical and numerical results are presented to show that beamforming using an intuitive form of the cross-spectral matrix of the co-array for noise MIMO radar provides no benefit over receive-only beamforming in the presence of any combination of scatterers, jammers and white noise when constant scattering coefficients are assumed. A time domain formulation is considered and theoretical and simulation results are presented to demonstrate its ability to realize the full gains of the co-array when a sufficient number of samples is used in the temporal component of the MIMO matched filter.