FIR函数通过定义的系数和延时线来实现有限脉冲响应FIR滤波器。该函数产生了对输入数据的响应。该过滤器（通带，阻带等特点）由系数和抽头数决定。-FIR function by defining the coefficients and delay line to achieve the finite impulse response FIR filter. The function of the input data generated response. The filter (passban

基于消声水池实测实验数据，估计两水听器之间的距离，使用的是匹配滤波器的方法进行的估计实验差，从而确定距离。-based on the real data from waterbank experiment for estimate the range between the two hydrophones. i use the match filter to estimate the delay between the two receivers.

分数延迟滤波器群延迟算法，放在word文档里，复制粘贴便可。-Fractional delay filter