A reference terminal used in positioning/locating of mobile terminals in a radiocommunication system is described. The reference terminal includes a time-of-arrival (TOA) receiver which is used to provide information associated with the location of mobile terminals. The TOA receiver also performs the...http://www.google.es/patents/US6166691?utm_source=gb-gplus-sharePatente US6166691 - Self-calibrating reference terminal
