2024知到答案数字信号处理（全英文）最新知到智慧树满分章节测试答案

文章目录[隐藏]

第一章单元测试
第二章单元测试
第三章单元测试
第四章单元测试
第五章单元测试
第六章单元测试
第七章单元测试
第八章单元测试

第一章单元测试

1、问题:Microcontrollers cannot be used in digital signal processing systems.（）
选项：
A:对
B:错
答案: 【
错
】

2、问题:The dimension of a signal is determined by the number of dependent variables in the signal.（）
选项：
A:对
B:错
答案: 【
错
】

3、问题:A signal that is generated in a random fashion and cannot be predicted ahead of time is called a deterministic signal.（）
选项：
A:对
B:错
答案: 【
错
】

4、问题:FIR DF is very easy to achieve exact linear phase, which is difficult in analog systems. （）
选项：
A:对
B:错
答案: 【
对
】

5、问题:The technology for signal processing was almost exclusively continuous-time analog technology until （）.
选项：
A:1950s
B:1960s
C:1970s
D:1980s
答案: 【
1960s
】

6、问题:According to the different input signals, the system can be divided into （）.
选项：
A:Analog System
B:Discrete-time System
C:Digital System
D:linear system
答案: 【
Analog System
Discrete-time System
Digital System
】

第二章单元测试

1、问题:A discrete-time signal is represented as a sequence of numbers called samples.（）
选项：
A:对
B:错
答案: 【
对
】

2、问题:Shift sequence x(n) to the right by m samples, for m>0, resulting in a new sequence （）.
选项：
A:x(n-m)
B:x(n+m)
C:x(-n+m)
D:x(-n-m)
答案: 【
x(n-m)
】

3、问题:Real-Valued Exponential Sequence aⁿu(n) must decay exponentially as n increases.（）
选项：
A:对
B:错
答案: 【
错
】

4、问题:A sinusoidal sequence is expressed by , thus its period is （）.
选项：
A:12
B:11
C:12/11
D:6
答案: 【
12
】

5、问题:Frequencies in the neighborhood of are called low frequencies, whereas, frequencies in the neighborhood of are called high frequencies.（）
选项：
A:对
B:错
答案: 【
错
】

6、问题:For the following system, which one is linear system? （）
选项：
A:
B:
C:
D:
答案: 【

】

7、问题:The impulse response h(n) is the output of a LTI system with zero state when the input is the unit sample sequence δ(n). （）
选项：
A:对
B:错
答案: 【
对
】

8、问题:To compute the output of LTI system described by difference equation, the main methods involve in （）.
选项：
A:classical solution from time domain
B:recursive solution from time domain
C:solution from transform domain
D:computation using MATLAB
答案: 【
classical solution from time domain
recursive solution from time domain
solution from transform domain
computation using MATLAB
】

9、问题:A discrete time sequence x(n) is developed by periodically sampling an analog signal x_a(t) at uniform time intervals, thus the spectrum of discrete time signal x(n) should be periodic extension of the spectrum of the original analog signal.（）
选项：
A:对
B:错
答案: 【
对
】

10、问题:In the process of converting analog signals to digital signals, the higher the sampling frequency is, the better the processing performance of the system will be.（）
选项：
A:对
B:错
答案: 【
错
】

11、问题:To recover the original continuous signal from the sampled signal without distortion, Which conditions should be satisfied?（）
Ⅰ. The original continuous signal should be bandlimited；
Ⅱ. The sampling rate of signals should be greater than twice the signal bandwidth；
Ⅲ. The ideal lowpass filter should be used to process the sampled signal.
选项：
A:Ⅰ、Ⅱ
B:Ⅱ、Ⅲ
C:Ⅰ、Ⅲ
D:Ⅰ、Ⅱ、Ⅲ
答案: 【
Ⅰ、Ⅱ、Ⅲ
】