Patent ID: 9749033
Date: 2017-08-29
CPC Classifications: H01Q,H04B

Claim:
1. A method for communication, comprising: providing an antenna system including a reflector having a focus and a feed array positioned at or near the focus and having N feed elements; receiving N feed signals via the N feed elements, the N feed signals resulting from illumination of the N feed elements by a target signal incident on the reflector from a slow-moving signal source; inputting the N feed signals to an N-to-N Fourier Transform device; performing a spatial Fourier Transform on the N feed signals to generate N output signals, via the N-to-N Fourier Transform device; computing a phase slope across the N output signals, via a correlation processor coupled to the N-to-N Fourier Transform device; and determining a direction of arrival of the target signal based on the phase slope, via a direction-of-arrival processor coupled to the correlation processor.