Accession Number : AD1048724


Title :   Method for Establishing Direction of Arrival by Use of Signals of Opportunity


Descriptive Note : Technical Report


Corporate Author : NUWC Newport United States


Personal Author(s) : Steinbrecher,Donald H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1048724.pdf


Report Date : 29 Aug 2017


Pagination or Media Count : 42


Abstract : A method is provided for use of a segmented aperture communications system to determine a direction of arrival of a radio signal in which the system includes a receiver plane having equally spaced and planar aligned radio frequency ports.Computation of the aperture segments depends on the port coordinates where the geometric relationship of the segments isused to determine a time delay and direction of arrival of the signal. The ports receive at least two orthogonal polarizations that characterize the incoming signals. A central port is used as reference to determine a phase difference associated at each port. Two angles are calculated by a simultaneous solution of two phase difference measurements to determine the direction of arrival solution. A mean direction of arrival solution is obtained by averaging solution estimates that are obtained by repeating the direction of arrival determination using random port pairs.


Descriptors :   patent applications , COMMUNICATION SYSTEMS , radio signals , radio frequency , transmission lines , digital images


Subject Categories : Radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE