@TechReport{	  it:1999-012,
  author	= {Erik G. Larsson and Petre Stoica},
  title		= {Array Signal Processing with Incomplete Data},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Systems and Control},
  year		= {1999},
  number	= {1999-012},
  month		= nov,
  abstract	= {This paper considers the problem of estimating the
		  Direction-of-Arrival (DOA) of one or more signals using an
		  array of sensors, where some of the sensors fail to work
		  before the measurement is completed. Methods for estimating
		  the array output covariance matrix are discussed. In
		  particular, the Maximum-Likelihood estimate of this
		  covariance matrix and its asymptotic accuracy are derived
		  and discussed. Different covariance matrix estimates are
		  used for DOA estimation together with the MUSIC algorithm
		  and with a covariance matching technique. In contrast to
		  MUSIC, the covariance matching technique can utilize
		  information on the estimation accuracy of the array
		  covariance matrix, and it is demonstrated that this yields
		  a significant performance gain. }
}