Patent ID: 9562961
Date: 2017-02-07
CPC Classifications: G01S

Claim:
1. An apparatus for estimating an angle of arrival of a signal transmitted from a signal-transmitting platform at a signal-receiving platform, the signal-receiving platform comprising an object and a movable component coupled to the object, wherein the movable component comprises spaced-apart first and second antennas, the apparatus comprising: a time-difference-of-arrival (TDOA) module configured to determine a difference between a time the signal arrives at the first antenna and a time the signal arrives at the second antenna; a frequency-difference-of-arrival (FDOA) module configured to determine a difference between a frequency of arrival of the signal at the first antenna and a frequency of arrival of the signal at the second antenna; and a comparison module configured to estimate the angle of arrival of the signal based on a comparison between the difference between the time the signal arrives at the first antenna and the time the signal arrives at the second antenna and the difference between the frequency of arrival of the signal at the first antenna and the frequency of arrival of the signal at the second antenna.