Patent ID: 7602334

Claim:
A method of a mobile subscriber (MS) estimating position, comprising: the MS receiving at least one satellite transmitted signal with a first receiver; the MS estimating a time of arrival of the at least one satellite transmitted signal; the MS receiving a plurality of terrestrial base station signals from a plurality of base stations with a second receiver, the MS identifying one of a plurality base stations as a serving base station; the MS determining a timing offset of the plurality of terrestrial base stations signals through communication with the serving base station; the MS estimating a time of arrival of each of the plurality terrestrial base station signals; compensating the estimated time of arrival of each of the plurality of terrestrial base station signals using the timing offset of the corresponding terrestrial base station signal, wherein the timing offset comprises a quantity proportional to the difference between the time of transmission of the terrestrial base station signal and the time of transmission of the received satellite signal; the MS estimating its position based on the estimated time of arrival of the at least one satellite transmitted signal and the compensated estimated times of arrival of the plurality of terrestrial base station signals.