Method for using only two base stations for determining the posi

Details Method for using only two base stations for determining the posi Method for using only two base stations for determining the posi

1996-06-06

2000-03-07

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

G01S 302

Patent

active

060346353

ABSTRACT:
A method for determining the position of a mobile station within a cellular telephone system having first and second base stations. A round trip signal propagation time between the first base station and the mobile station is measured at the first base station. A first signal is transmitted from the first base station to the mobile station, and a second signal is transmitted from the second base station to the mobile station. An arrival time difference representing a time interval between a first relative time when the first signal is received at the mobile station and a second relative time when the second signal is received at the mobile station is measured at the mobile station. The position of the mobile station is determined in accordance with the round trip propagation time and the arrival time difference.
A method for determining the position of a mobile station within a cellular telephone system having first and second base stations. A first round trip signal propagation time between the first base station and the mobile station is measured at the first base station. A second round trip signal propagation time between the second base station and the mobile station is measured at the second base station. The position of the mobile station is determined in accordance with the first and second round trip propagation times.

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