Patent ID: 9151821
Filing Date: 2015-10-06
Classification: G01S

Abstract:
1. A method for determining the position of a mobile device, said method comprising: in the mobile device, receiving a first signal from a first antenna element of a first base station and a second signal from a second antenna element of the first base station, wherein the first base station includes a first antenna array having at least the first antenna element and the second antenna element, and the first signal from the first antenna element and the second signal from the second antenna element have an overlapping geographical coverage; receiving a third signal from a third antenna element of a second base station, wherein the second base station includes a second antenna array having at least the third antenna element and a fourth antenna element; processing the first signal to determine first watermark identification information indicative of the first antenna element, the first watermark information identifying a time delay introduced into signals transmitted by the first antenna element; processing the third signal to determine third watermark identification information indicative of the third antenna element, the third watermark information identifying a time delay introduced into signals transmitted by the third antenna element; access information indicative of one or more characteristics of the first antenna using the determined watermark information associated with the first antenna; receive the information indicative of the one or more characteristics of the first antenna in a communication and store the information in a memory, the memory further storing information indicative of characteristics of a plurality of antennas associated with watermark information for each of the plurality of antennas; determine pseudorange information indicative of a distance from the first antenna to the mobile device using the information indicative of the one or more characteristics of the first antenna; and providing position information indicative of the position of the mobile device, wherein the position information is determined using at least the first signal and the third signal and using the pseudorange information.