数字滤波算法：基于L*MAD准则的中值数决策滤波器。数字滤波器是用软件实现的，不需要增加硬设备，因而可靠性高、稳定性好，不存在阻抗匹配问题。-Digital filtering algorithm: Based on the L* MAD guidelines median number of decisions filter. The digital filter is implemented in software, no additional hardware devices, and t