System and method for digital direction finding

A method for finding an orthogonal direction of a radiation source with respect a digitally optimized interference pattern of a first fixed electromagnetic element and a second fixed electromagnetic element comprising:

• detect a first signal associated with the first fixed electromagnetic element, the first signal transmitted by the radiation source;
• detect a second signal associated with the second fixed electromagnetic element, the second signal transmitted by the radiation source;
• recursively digitally phase shift the first detected signal and/or the second detected signal to create a changing interference pattern;
• sample the changing interference pattern while digitally phase shifting the first detected signal and/or the second detected signal to obtain the digitally optimized interference pattern, wherein the digitally optimized interference pattern is formed by destructive interference between the first signal and the second signal to obtain a local minima associated with the destructive interference;
• bisect the digitally optimized interference pattern about the local minima forming a reference line or a reference plane;
• determine the orthogonal direction of the radiation source using the reference line or the reference plane;
• and
• use the determined orthogonal direction of the radiation source with respect to the digitally optimized interference pattern of the first fixed electromagnetic element and the second fixed electromagnetic element to at least partially control a vehicle, a flying device, an electronic device, a satellite, an autonomous vehicle, a projectile, an autonomous robot, a tracking system, or a combination thereof.