Patent ID: 9057776
Filing Date: 2015-06-16
Classification: G01S

Abstract:
1. A method for determining a direction finding (DF) to a received radio frequency (RF) signal, the method comprising: receiving, via a linear interferometer array, an RF signal; receiving, from said linear interferometer array, at least two differences in electrical phase of said RF signal between at least three antenna elements of said linear interferometer array; determining, via a closed form algorithm, a first integer solution based on said at least two differences in electrical phase; determining, a plurality of adjacent integer solutions based at least in part on said first integer solution, each of said plurality of adjacent integer solutions having in common at least one variable; determining a plurality of extended phase solutions based on one of said plurality of adjacent integer solutions and said at least two differences in electrical phase; scaling said plurality of extended phase solutions based on a frequency of said RF signal, said scaling resulting in a plurality of scaled solutions; determining a plurality of deviations associated with each of said plurality of scaled solutions from at least one of said at least two differences in electrical phase; determining a minimum deviation from said plurality of deviations associated with each of said plurality of scaled solutions; selecting one of said plurality of scaled solutions with said minimum deviation as an output DE; configuring and transmitting said output DF to an analysis and control processor; and displaying said output DF to an operator on a display.