System and computer-implemented method for moving object detection and location determination using delay rate spectrum

A system for detecting a moving object, comprising:

• a detector module comprising at least two antennas:
• a first antenna and a second antenna, wherein the first antenna and the second antenna are separated by a baseline distance;
• a processing module comprising one or more processors, the processing module configured to:
• receive a first signal from the first antenna and a second signal from the second antenna;
• determine a delay-rate spectrum for the first signal and the second signal based on a cross-correlation function followed by a 2D fast Fourier transform (2D FFT) and an observation time period, wherein the cross-correlation function comprises determining at least a delay, a rate, or a combination thereof, between the between the first signal and the second signal based on a mathematical correlation function;
• and
• detect the moving object based on the determined delay-rate spectrum.