Patent ID: 9191844
Filing Date: 2015-11-17
Classification: G01S,H04B,H04W

Abstract:
1. A method comprising: measuring a first time for a first signal to propagate between a point in a first end data input transmit system and a point in a first end transmit air frame detector; measuring a second time for the first signal to propagate between a point in a second end receive air frame detector and a point in a second end data receive system; measuring a third time for the first signal to propagate between the point in the second end data receive system and a point in a second end data input transmit system; measuring a fourth time for the first signal to be received by the point in the second end data transmit system and a second signal to be received at a point in a second end transmit air frame detector; measuring a fifth time for the second signal to propagate between a point in a first end receive air frame detector and a point in a first end data receive system; measuring a sixth time based on when the second signal is received by the point in the first end data receive system to when the first signal is received by the point in the first end data input transmit system; determining a seventh time for a first data to propagate between the point in the first end transmit air frame detector and the point in the second end receive air frame detector based on the first, second, third, fourth, fifth and sixth time; and determining a phase of a third signal including the first data, the determining the phase being based at least in part on the seventh time; wherein the determining the seventh time comprises subtracting the first time, the second time, the third time, the fourth time, and the fifth time from the sixth time to determine a link time, and dividing the link time by two.