Patent ID: 7251267
Filing Date: 2007-07-31
Classification: G01S,H04B

Abstract:
1. A method for determining a best round trip delay (RTD) indicator for mobile telephone signals originating from a mobile unit and received at a plurality of base stations in a wireless telecommunications system comprising at least some base stations using rake receivers, each rake receiver comprising a plurality of fingers; the method comprising: collecting a plurality of finger characteristics from one or more rake receiver fingers assigned to one or more multi-path components of a signal, at least some of the finger characteristics comprising information about the finger's time history; determining finger lock categories for at least one of the assigned one or more rake receiver fingers using the collected one or more finger characteristics; selecting a rake receiver finger from the one or more rake receiver fingers using the determined finger lock categories, wherein the selected rake receiver finger has an associated round trip delay indicator; and recording the round trip delay indicator corresponding to the selected rake receiver finger.