A location system is disclosed for commercial wireless telecommunication infrastructures. The system is an end-to-end solution having one or more location centers for outputting requested locations of commercially available handsets or mobile stations (MS) based on, e.g., CDMA, AMPS, NAMPS or TDMA communication...http://www.google.de/patents/US20030146871?utm_source=gb-gplus-sharePatent US20030146871 - Wireless location using signal direction and time difference of arrival
