“…In the multi-antenna signal synthesis system, TDOA estimation is actually a time-delay alignment problem between each received signal and the reference signal. The approaches for TDOA between two signals include the basic cross-correlation method, the generalized cross-correlation method [2] , the higher-order cumulant method [3] , adaptive time-delay estimation algorithm [4] and so on. The TDOA estimation performance mainly depends on SNR of received signal, observation time and signal bandwidth.…”