2024知到答案 数字信号处理（英文）（西北工业大学） 最新智慧树满分章节测试答案
模块一 单元测试
1、多选题：
Prerequisites of this course include: （ ）
选项：
A:Signals and Systems
B:Complex Variables
C:Painting
D:Calculus
答案: 【Signals and Systems;
Complex Variables;
Calculus】
2、判断题：
If you measure and record your weight everyday, that is a digital signal.（ ）
选项：
A:对
B:错
答案: 【对】
3、多选题：
What are the advantages of digital signal processing: （ ）
选项：
A:Flexible and programmable
B:Reliable and accurate
C:Easy to implement by VLSI
D:Popularity of digital devices
答案: 【Flexible and programmable;
Reliable and accurate;
Easy to implement by VLSI;
Popularity of digital devices】
4、判断题：
Digital signal processing is something new and does not have a long and rich history. （ ）
选项：
A:错
B:对
答案: 【错】
5、判断题：
A speech signal as well as a digital image are typically in 1D. （ ）
选项：
A:错
B:对
答案: 【错】
模块二 单元测试
1、判断题：
If an LTI system has an impulse response with finite sample values, and it is FIR, then it is a stable system.（ ）
选项：
A:错
B:对
答案: 【对】
2、判断题：
If an LTI system has an impulse response with finite sample values, and it is IIR, it is an unstable system. （ ）
选项：
A:错
B:对
答案: 【错】
3、单选题：
Given a Sinusoidal sequence 
. Which of the following is its period? （ ）
选项：
A:8
B:4
C:No period
D:16
答案: 【No period】
4、单选题：
Convolution sum is useful for computation of the output if the system is（ ）。
选项：
A:linear
B:linear & time Invariant
C:time invariant
D:stable
答案: 【linear & time Invariant】
5、单选题：
If the sequence is of length L and the impulse response of an LTI system is of length P. What will be the length after their convolution?（ ）
选项：
A:L+P
B:P
C:L+P-1
D:L
答案: 【L+P-1】
模块三 单元测试
1、多选题：
The Fourier transform of an aperiodic sequence is（ ）
选项：
A:Aperiodic
B:Periodic
C:Discrete
D:Continuous
答案: 【Periodic;
Continuous】
2、单选题：
The eigenfunction of an LTI system is the（ ）
选项：
A:unit step sequence
B:sinusoidal sequence
C:complex exponential sequence
D:real exponential sequence
答案: 【complex exponential sequence】
3、单选题：
Which of the following is the correct formula for DTFT? （ ）
选项：
A:
B:
C:
D:
答案: 【】
4、多选题：
Which of the following is/are corresponding to a low frequency? （ ）
选项：
A:
B:0
C:
D:
答案: 【;】
5、单选题：
The DTFT of 
is（ ）
选项：
A:1
B:0
C:
D:
答案: 【1】