Patent ID: 8571577

Claim:
A method comprising: (1) receiving, at a location server: (i) a first measured error rate for a first signal that is received by a wireless terminal, and (ii) a second measured error rate for a second signal that is received by the wireless terminal; and (2) estimating, at the location server, a first location of the wireless terminal based on the first measured error rate and the second measured error rate; wherein the first measured error rate and the second measured error rate are measured at the wireless terminal; and wherein (2) the estimating the first location of the wireless terminal comprises: (2.1) comparing the first measured error rate to: (2.1.i) a first expected error rate for the first signal when the wireless terminal is at a second location, and (2.1.ii) a second expected error rate for the first signal when the wireless terminal is at a third location; and (2.2) comparing the second measured error rate to: (2.2.i) a first expected error rate for the second signal when the wireless terminal is at the second location, and (2.2.ii) a second expected error rate for the second signal when the wireless terminal is at the third location.