Patent ID: 7039433

Claim:
Method for determining times of transmission of signals transmitted by at least one radio transmitter (BTS), the method comprising: transmitting signals by said at least one radio transmitter (BTS); receiving transmitted signals by at least two radio receivers (LMU A,B); determining for each of said radio receivers (LMU A,B) the respective times of reception of the received signals; estimating for each of said radio receivers (LMU A,B) times of transmission of said received signals based on the determined times of reception of said received signals and on the geographical location of the at least one radio transmitter (BTS) and the respective radio receiver (LMU A,B); filtering the estimated times of transmission based on a determined difference in the time levels of the times of transmission estimated separately for the at least two radio receivers (LMU A,B) for obtaining accurate values for the transmission times of signals transmitted by said radio transmitter (BTS).