Coincidence of the Rao test, Wald test, and GLRT of MIMO radar in gaussian clutter

This paper deals with the problem of detecting signal with MIMO radar in correlated Gaussian clutter with known covariance matrix. The general MIMO model, with widely separated sub-arrays and co-located antennas at each sub-array, is adopted. It is proved that the Rao test and the Wald test coincide with generalized likelihood ratio test (GLRT).