Classical and Modern Direction-of-Arrival Estimation (Academic Press 2009).pdf

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Preface
The need for direction-of-arrival (DOA) estimation arises in many engineer-
ing applications including munications, radar, radio astronomy,
sonar, navigation, tracking of various objects, and rescue and other emergency
assistance devices. In its modern version, DOA estimation is usually studied
as part of the more general field of array processing. Much of the work in
this field, especially in earlier days, focused on radio direction finding—that
is, estimating the direction of ic waves impinging on one or more
antennas.
The problem of acoustic direct