Abstract:

Based on distributed multi-antenna system, a new method for time difference of arrival （TDOA） estimation in multipath environment is proposed. By utilizing advantages of distributed multi-antenna system, the traditional TDOA measurement is converted into the time delay estimation of the first arrival path (FAP) by constructing orthogonal training sequences. Comparing with the non-line-of-sight （NLOS） error induced by traditional timing and synchronization method, numerical simulations are carried out and the results show that the NLOS error imposed on the TDOA estimation can be reduced by 65% with the method proposed. Therefore, the TDOA estimation accuracy can be significantly enhanced.

Key words: distributed multi-antenna system； wireless location；non-line-of-sight, time difference of arrival