说明：  ex3_2 求系统的阶跃响应 ex3_3 级联型系统结构的参数求解 ex3_4 并联型系统结构的参数求解 ex3_5 求系统频率抽样型结构 ex3_6 全零点性滤波器Lattic结构 ex3_7 全极点性滤波器Lattic结构 ex3_8 零极点性滤波器Lattic结构
(ex3_2 system step response for a cascade system ex3_3 parameters ex3_4 parallel systems to solve the structure of the system parameters to solve for the frequency of sampling ex3_5 structure of filter ex3_6 0:00 Lattic whole structure of all-pole filter ex3_7 structure Lattic Pole-zero ex3_8 structure of filter Lattic)