Abstract:

Improving the operational rate and time resolution of time delay estimator is critical for vertical liner array to realize fast and precise passive localization of underwater sound targets, the conventional adaptive least mean square time delay estimation ( LMSTDE ) algorithm, which sequences the iterative operation of filter updating error updating coefficient, is optimized as the parallel multiplicative and additive operations of updating error and updating coefficients. The optimized least mean square ( LMS ) time delay estimator has compact structure and does not change its error convergence characteristic. Similar examination in anechoic tank indicates that the optimized LMS time delay estimator based on field programmable gate array ( FPGA) improves the operational rate without pipeline or schedule control unit and  has definite anti noise jamming performance.