信号与系统-华南理工大学期末考试试卷.doc

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华南理工大学期末考试
《 Signals and Systems 》试卷 B
注意事项:1. 考前请将密封线内各项信息填写清楚;
2. 所有答案请直接答在试卷上;
:闭卷;
4. 本试卷共 3 大题,满分100分, 考试时间120分钟。
题号
一
二
三
总分
得分
评卷人
选择题(4分/每题,共20分)
1. Determine the output of the systems described by following differential equation:
,
Determine zero-initial response and zero-state response :( )
(A),,
(B),
(C),
(D),
2. Evaluate the following discrete-time convolution sums: = ( )
(A)
(B)
(C)
(D)
3. The FS ofis , the FS of ( ) is .
(A) (B) (C) (D)
4. The frequency response of a LTI system is , it is distortionless transmission or not? Determine the system output if the input is x(t)=sint+sin3t (-¥<t<¥) . ( )
it is distortionless transmission;
it is not distortionless transmission;
it is distortionless transmission;
it is not distortionless transmission;
5. The impulse response of a LTI system is ,the step response for the system is ( )
(A) (B), here
(C) (D) , here
填空题(4分/每题,共20分)
1. A system has inputand output . If the system has
properties, then the input and output pairs has the relationship: input is, so output is 。
2. Consider sampling ,determine the maximum of sampling interval T so that there will be no aliasing, (s).
3. Write or Sketch the spectru