因为单位冲激信号( ) ,所以我们使用单位冲激响应h(t)来表征LTI系统特性。
A: 是周期连续的
B: 便于采样
C: 是正交信号
D: 含有所有频率分量
A: 是周期连续的
B: 便于采样
C: 是正交信号
D: 含有所有频率分量
举一反三
- 因为单位冲激信号δ( ),所以我们使用单位冲激响应来表征LTI系统特性。1bc4e417c7b0d75fe9298989d2bf54ff
- 两个单位冲激响应分别为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/b1f29e9ad1e54df9970c1be374e67572.png"/>和<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/4c734b95e1024abfbc0741fb7c5455e2.png"/>的LTI系统并联构成的系统的单位冲激响应是<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/d7c571b4af814da7997bc653b0fbe308.png"/>。
- 信号通过单位冲激响应为的LTI系统,输出等于( ) 。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/f6cb0e4770dd46459497fe9b56a87710.png
- 信号<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/c67ef484b9f44325881bb93d513d4b28.png"/>通过单位冲激响应是<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/9f31696ca833480fb881cbc3523f3db2.png"/>的LTI系统,<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/fd12806eeb5c4e898fe9689b48dffd73.png"/>,下列说法错误的是? A: 如果对h(t)进行换元反转及时移操作,则卷积积分的被积函数是1+T-t B: 求0<t<1时的y(t)时,卷积积分的积分区间为(0,t) C: 当1<t<2时,<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/3a5bd3e706d5413f8edd6da0a8722c45.png"/> D: 当t<0或t>2时,y(t)=0
- 下列方程所描述的系统中( )是线性时不变系统。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/5740348e23d246eebda0442284882d6d.png"/> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/87c5df9c28f54b398bbedc5da45e7a02.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/ece1036e5a3c410e8f8b3de147910c04.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/69fc98a558ce4f3eb743c68be74cf923.png"/>