Patent ID: 8249618
Filing Date: 2012-08-21
Classification: G01S

Abstract:
1. A system operable to enable determination of a position of a receiver, comprising: an RF receiver configured to receive a periodic signal; and a phase difference estimator, wherein the periodic signal is received by the receiver from an antenna array of at least two spaced-apart antennas, the periodic signal has parts separated by a time delay and having a same frequency, different parts of the periodic signal are transmitted by different antennas of the at least two spaced-apart antennas, the RF receiver is associated with the phase difference estimator, the phase difference estimator is configured to measure phase differences between the parts of the signal, the phase differences being indicative of at least a surface, and the position of the receiver is on the at least the surface, wherein the at least the surface is a cone, and the receiver is located on the cone.