氖范杀鄙汀坡舌究夏寡伪田谱
剩鄙妇柿厦狄碱病棵部率颊偷
A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filter(b,a,x); 答案: b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x);
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![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第1张](http://www.xuexianswer.com/wp-content/uploads/2021/07/XES3J9RL_SEZKWT32X.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第1张-萌面人点PRO")
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第2张](http://www.xuexianswer.com/wp-content/uploads/2020/07/%E5%89%8D%E5%BE%80.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第2张-萌面人点PRO")
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以下那个说法是正确的？
A:在对连续时间信号进行采样得到离散时间信号的过程中，只要实现了等间隔采样，采样间隔T怎样选择都不会影响采样后离散时间信号的频谱特征。
B:在对连续时间信号进行采样得到离散时间信号的过程中，采样间隔T的选择非常关键，如果选择不当，采样后的离散时间信号将存在频域混叠失真现象。
答案: 在对连续时间信号进行采样得到离散时间信号的过程中，采样间隔T的选择非常关键，如果选择不当，采样后的离散时间信号将存在频域混叠失真现象。
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第4张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/367a4b5a90b24f6aab738de930850822.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第4张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第6张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/59b3d1c7b0ce4a0eac1963e5252aaaec.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第6张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第8张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/6185f3821b5c47ebb6809a94ced182ac.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第8张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第11张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/9c64222970614da68559bebefc84d661.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第11张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第13张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/bb6a20f587f3454f8604da0f4f6d42d9.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第13张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第18张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/9b865c44126548c284522b9e17d80ddc.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第18张-萌面人点PRO")
A:对
B:错
答案: 对
下面哪段语句不会报错？
A:x = [1 2 3];h = ones(1,5);n=0:7;y=conv(x,h);stem(n,y);
B:x = ones(1,4);nh = 0:2;h = (nh+1)ones(1,3);n=0:5;y=conv(x,h);stem(n,y);
C:x = ones(1,5);nh = 0:2;h = (nh+1). ones(1,3);n=0:6;y=conv(x,h);stem(n,y);
答案: x = ones(1,5);nh = 0:2;h = (nh+1).* ones(1,3);n=0:6;y=conv(x,h);stem(n,y);
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第20张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/5944592652604641b1f7848d1abef389.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第20张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第22张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/d88e2b3e71ea46159551c72526c9f22f.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第22张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第24张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/caa546e84c8643d3804c87e36ec1193e.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第24张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第26张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/38a5ea677cf24c8fb9e74335afd7dff0.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第26张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第29张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/a82ea234f0244e2692b80630883aa467.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第29张-萌面人点PRO")
答案:
请问以下哪个说法是正确的？
A:连续时间正弦信号采样后一定为周期序列。
B:连续时间正弦信号采样后不一定为周期序列。
答案: 连续时间正弦信号采样后不一定为周期序列。
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第34张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ccee2df3a8774fd1885572fcfcd2d3a4.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第34张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第36张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/cd4d30646aa74e8c87058732b74fc592.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第36张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第38张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/a8ec3961306a456a98797854145f5fd1.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第38张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第41张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ba7795b8e3ce4f56924d633451fffbc8.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第41张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第43张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/61ecb3a7a62a43e58c043d45acb3c4e5.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第43张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第48张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/d7daec0b26bb4434b1bb63afb46dc62d.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第48张-萌面人点PRO")
A:8
B:3
C:8/3
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第50张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/2a35e517ef7a447ba0f4b52918279a06.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第50张-萌面人点PRO")
答案: 8
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第52张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/a23264c8a57142e5a07166b273ea8366.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第52张-萌面人点PRO")
A:5
B:10
C:20
D:40
答案: 10
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第54张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/7474b00d5af44037a464ca6a4628c74f.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第54张-萌面人点PRO")
A:线性移变系统
B:线性移不变系统
C:非线性移变系统
D:非线性移不变系统
答案: 非线性移不变系统
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第56张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/aa00033d661d441dbdaa5be4fcecc80f.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第56张-萌面人点PRO")
A:线性移变系统
B:线性移不变系统
C:非线性移变系统
D:非线性移不变系统
答案: 线性移变系统
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第58张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/22a16185fe064c5fbe35ab93599034d7.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第58张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第61张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/3b8663f5422944ffb0b2376d59b0fb56.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第61张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第63张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/3ef6dedb1d944386abecefc64b5f928d.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第63张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第68张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/cdf474f9a47d4846aa531c09ad482b83.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第68张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第70张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/908c545044a143c2a48ee2ec68da32e2.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第70张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第72张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/b51de703faf84a8988be24f9230a3af1.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第72张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第75张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/9935442f79d84837b814769eea346d14.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第75张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第77张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/5d07c0382f5f41abb856159cb0c4e4e4.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第77张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第82张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/9590301e4bff43c5830e49af0359a326.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第82张-萌面人点PRO")
A:因果稳定系统
B:非因果稳定系统
C:因果非稳定系统
D:非因果非稳定系统
答案: 因果稳定系统
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第84张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/8741391879e74d2faa9d06ccce36a568.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第84张-萌面人点PRO")
A:系统是因果稳定系统
B:系统是非因果稳定系统
C:系统是因果非稳定系统
D:系统是非因果非稳定系统
答案: 系统是非因果稳定系统
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第86张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/b427f5dbaefb48c78b0625e8c5800070.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第86张-萌面人点PRO")
A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x);
B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filter(b,a,x);
答案: b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x);
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第88张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/86c8f78e0b3a415dac38e04ece7be5ac.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第88张-萌面人点PRO")
A:200ms
B:150ms
C:10ms
D:2ms
答案: 2ms
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第90张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ee5ecb1ede824f1cbc33f48a6b0b82e1.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第90张-萌面人点PRO")
A:采样间隔T的取值是不唯一的。
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第92张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ddd30d9d860f4e10bc6c198d3ffb88ee.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第92张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第95张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/74e0e6d32e7d4616ab50038f4e47cedb.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第95张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第97张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/736170beb3b2429cb52aec5999c49da9.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第97张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第102张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ddaea87f03e044f38c5bb6a05fe1106a.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第102张-萌面人点PRO")
A:20Hz
B:40Hz
C:60Hz
D:100Hz
答案: 20Hz
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第104张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/c1f74f6e5e6e4602a9b272ac374d5381.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第104张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第106张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ece1290143ef4b90b81bf508ac2d4f6b.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第106张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第108张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/b943295ce6f74a7082c36b771461459b.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第108张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第111张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/7140b9162c8148b49c2ba32c25d24cf2.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第111张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第113张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/0dc2ebd2d3644a35804c6ed328847c48.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第113张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第118张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/a91718b679894de699e759a7e4e02181.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第118张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第120张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/d1040d46f3ff478e8348f8a7ae57bd18.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第120张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第122张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/6afe3cd535a34c309234282213bc9f77.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第122张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第124张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/76571e3c39554b46abac82b0fc844c12.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第124张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第127张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/c8aa3cd97ada43af85efe6e5180b8b7a.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第127张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第132张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/f13a1a4fe2b648039d579bbfbb3883dc.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第132张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第134张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/c688e98fcd274488982b160a0d8038a5.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第134张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第136张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/db9d5db7d07d4a8c9c25cdce626d38c0.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第136张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第139张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/147d7e95612a4c3c9447b38256bffcff.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第139张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第141张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/dd193570806142cc833c1301265baa39.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第141张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第146张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/be79a1d3ec3048a2bc3a67a1ca616445.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第146张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第149张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/d22656fde1dc441ab034a16439170126.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第149张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第151张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/1bcc5f9def4a4b3d80cd4800a0589f67.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第151张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第153张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/dafac06a1a1743528b1b3e66ab4ec117.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第153张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第155张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/148619f608984d61a83847540cc1483a.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第155张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第160张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/406b84ff15e449d7bd0be961aa3e3b71.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第160张-萌面人点PRO")
A:对
B:错
答案: 错
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第162张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/31b699ace693492b87baefd67c6f88be.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第162张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第164张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/1cae10296050413da010e2f0e58b726a.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第164张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第167张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/eec8133f3c7a4ec9b6255a460c4196fe.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第167张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第169张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/526e3db36add4830a03c676cae789c82.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第169张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第171张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/30f2eff8acb14af68270840d58a9dc3a.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第171张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第176张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/c60b5e32d01c47ef91c06eca59fbe4f2.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第176张-萌面人点PRO")
A:该系统不具有线性相位
B:该系统具有线性相位
C:该系统的群延迟为2
D:该系统是因果稳定系统
答案: 该系统具有线性相位,该系统的群延迟为2,该系统是因果稳定系统
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第178张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/a14f62d052e14ea0a343eda38b9c0123.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第178张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第180张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/949df8050d6c434c85154726c4de187e.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第180张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第183张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/0e60cc03ce7a4ace95a099ab0a32361e.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第183张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第185张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/2ef1d7f3e4db4ffa82674c46108ca583.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第185张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第187张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/0ca6b3a70ae6410d90bcf3ce80b9e362.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第187张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第192张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/e026f17e752a4643bbfc57f3338dc69f.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第192张-萌面人点PRO")
A:单位圆上
B:单位圆外
C:单位圆内
D:原点处
答案: 原点处
已知某数字滤波器的系统函数如下，请问，下面哪个滤波器具有带通的滤波特性：___。
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第194张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/1d5ac294b6934f12be9ea1bfcded7115.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第194张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第196张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/e8b2eb73f0774fe19ced7c5856588fef.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第196张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第199张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/126d237dffc04cce82ae988eba96b4a5.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第199张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第201张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/b145a6fba92e4284b9c706241daadc03.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第201张-萌面人点PRO")
答案:
某LSI因果离散时间系统的采样频率是1000Hz，以下哪种系统函数零极点的设计方法可以滤除输入信号中100Hz的频率成分？
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第206张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ef8727d1d1d54cf4a93eda692fcc0e90.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第206张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第208张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/b05345dc0f434c809654a9aefa9b5ea3.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第208张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第210张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/053184a4589b4946b657951eef09585a.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第210张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第213张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/c1adeacb329e4fe59c46095646776f54.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第213张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第218张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/cd47b7d7520247bfad02cea57ac7c84a.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第218张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第220张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/507f8037331e456ca315c86f52c95e2f.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第220张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第223张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/b3316a8618704efe9044d5c5a5b999ea.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第223张-萌面人点PRO")
答案:
已知某线性时不变系统的系统函数如下，试问下面哪个系统具有陷波器的功能：__。
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第228张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/8623806ff51e43908ebed3d584ed4f94.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第228张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第230张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/5034af8132d9425c811578a0700523aa.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第230张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第233张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/d7aabe6881df475d97fa1fbd41ffa7cd.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第233张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第235张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/7492148918bd462abe4da4bb2a63ce1e.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第235张-萌面人点PRO")
答案:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第240张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/73c29a885d91443e8e0c17dbcf6e2d5b.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第240张-萌面人点PRO")
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第242张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ce99c5336924490e8110df89fb6d9b03.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第242张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第245张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/3ebe75f122a043fa83c1001db6177973.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第245张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第247张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/5e16ef05c84245aeb32e0718733f3cd0.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第247张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第249张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/7f3dc8fd6701491cafb81ffba5e1c177.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第249张-萌面人点PRO")
答案:
已知LSI系统的系统函数如下，请问哪一个系统是最小相位系统：___。
A:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第254张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/ab3ad86484c34220a09cab261742af10.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第254张-萌面人点PRO")
B:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第256张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/74ebfcc8eacb4c318f5e48402590ac91.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第256张-萌面人点PRO")
C:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第258张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/2427473f4a5a499c8b16d6ff58962998.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第258张-萌面人点PRO")
D:
![A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第261张](http://image.zhihuishu.com/zhs/onlineexam/ueditor/201810/bc9b86e368224048bbc33d0d4576afd2.png "A:b = [1 1];a = [1 -0.9 0.81];x = ones(1,100);y = filter(b,a,x); B:b = [1 1];a = [1 0.9 -0.81];x = ones(1,100);y = filte第261张-萌面人点PRO")
答案:
臼含朵潦淑德茧柒蹄苦阶揽垃
氢媒辽募女射粹箩夕段输缴氦