VEHICLE POSITION TRACKING TECHNIQUE

A method and system (50) for tracking the position of a moving transmitter using angle of arrival measurements from direction finding antenna arrays (60, 70). Each array includes several elements (60A-60N, 70A-70N), with the elements grouped to provide subarrays of different element spacings which are multiple of one half the transmitter wavelength. Ambiguity is rejected by processing angle data received from the subarrays. The signals from the arrays are processed to convert electrical phase delay into spatial angles, the spatial angle data is processed to provide the x,y position, velocity and acceleration of the transmitter. For transmitters mounted in moving vehicles, the system further processes the x,y data and applies a quality weighting factor that filters out multipath factors and permits estimation of vehicle profile information.