@TechReport{	  it:2019-010,
  author	= {Umberto Soverini and Torsten S{\"o}derstr{\"o}m},
  title		= {The {F}risch Scheme: Time and Frequency Domain Aspects},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Systems and Control},
  year		= {2019},
  number	= {2019-010},
  month		= nov,
  abstract	= {Several estimation methods have been proposed for
		  identifying errors-in-variables systems, where both input
		  and output measurements are corrupted by noise. One of the
		  more interesting approaches is the Frisch scheme. The
		  method can be applied using either time or frequency domain
		  representations. This paper investigates the general
		  mathematical and geometrical aspects of the Frisch scheme,
		  illustrating the analogies and the differences between the
		  time and frequency domain formulations.}
}