PHASE  TECHNOLOGIES  OF  SIGNAL  PROCESSING.
DIRECTION-OF-ARRIVAL  ESTIMATION
 

M. M. Nesterov, V. N. Trifanov

Saint-Petersburg Institute of Informatics and Automation RAS


 


    Signal reception by three omnidirectional equidistant receivers in-line to each other arranged as a single three-pole system (tripole) is investigated. The Schrödinger equation is transformed to a first-order difference equation with argument lag, and the Poisson wave equation — to the second-order difference equation. These difference equations in the phase interpretation (equiphase time and synchronous base) allow direction-of-arrival estimation by geometrical techniques using the tripole without recourse to the notion of signal propagation velocity. To a first approximation, the first-order phase solutions yield the target angle, and the second order phase solutions — the target distance. The proposed methods allow high-frequency target scanning (24 frames per second with an angle of view of 36×36 degrees).