Patent ID: 8965301
Filing Date: 2015-02-24
Classification: G01S,H04W

Abstract:
1. A method, comprising: transmitting, by a first node, a first carrier signal; receiving, from a second node, a second carrier signal; measuring, by the first node, a first value and a second value of a first phase, the first value of the first phase assigned to a first frequency of the received second carrier signal and the second value of the first phase assigned to a second frequency of the received second carrier signal, the first frequency and the second frequency having a frequency difference, a third value of a second phase assigned to a third frequency of the first carrier signal, a fourth value of the second phase assigned to a fourth frequency of the first carrier signal, the third frequency and the fourth frequency having the frequency difference; and determining a distance between the first node and the second node from the frequency difference from the first value and the second value of the first phase and from the third value and the fourth value of the second phase.