Patent ID: 8774260
Filing Date: 2014-07-08
Classification: H04B

Abstract:
1. A method of estimating a delay between a first signal and a second signal, the method comprising: receiving the first signal; receiving the second signal; for each of a plurality of candidate delays between the received first signal and the received second signal, determining a correlation value between the received first signal and the received second signal; and based on the determined correlation values, selecting one of the plurality of candidate delays to be used as an estimate of the delay between the received first signal and the received second signal, wherein the method further comprises: determining that a disturbance condition is present on the received second signal for at least one of the plurality of candidate delays; while the disturbance condition is determined to be present, for each of said at least one of the plurality of candidate delays: generating an artificial second signal, wherein the artificial second signal is generated such that a correlation value for the candidate delay between the received first signal and the artificial second signal is kept constant at a value based on a determined correlation value for the candidate delay between the received first signal and the received second signal prior to determining that the disturbance condition is present; and while the disturbance condition is determined to be present, using the artificial second signal in combination with the received second signal for said at least one of the plurality of candidate delays in order to select one of the plurality of candidate delays to be used as the estimate of the delay between the received first signal and the received second signal.