# 2023知到答案 数字信号处理（全英文）（山东科技大学） 最新智慧树满分章节测试答案

## 第一章 单元测试

1、判断题：
Microcontrollers cannot be used in digital signal processing systems.（ ）

A:错
B:对

2、判断题：
The dimension of a signal is determined by the number of dependent variables in the signal.（ ）

A:对
B:错

3、判断题：
A signal that is generated in a random fashion and cannot be predicted ahead of time is called a deterministic signal.（ ）

A:对
B:错

4、判断题：
FIR DF is very easy to achieve exact linear phase, which is difficult in analog systems. （ ）

A:对
B:错

5、单选题：
The technology for signal processing was almost exclusively continuous-time analog technology until （ ）.

A:1970s
B:1960s
C:1980s
D:1950s

6、多选题：
According to the different input signals, the system can be divided into （ ）.

A:Discrete-time System
B:Digital System
C:Analog System
D:linear system

Digital System;
Analog System

## 第二章 单元测试

1、判断题：
A discrete-time signal is represented as a sequence of numbers called samples.（ ）

A:错
B:对

2、单选题：
Shift sequence x(n) to the right by m samples, for m>0, resulting in a new sequence （ ）.

A:x(n+m)
B:x(-n+m)
C:x(-n-m)
D:x(n-m)

3、判断题：
Real-Valued Exponential Sequence anu(n) must decay exponentially as n increases.（ ）

A:错
B:对

4、单选题：
A sinusoidal sequence is expressed by , thus its period is （ ）.

A:6
B:12
C:11
D:12/11

5、判断题：
Frequencies in the neighborhood of are called low frequencies, whereas, frequencies in the neighborhood of are called high frequencies.（ ）

A:错
B:对

6、单选题：
For the following system, which one is linear system? （ ）

A: B: C: D: 7、判断题：
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). （ ）

A:对
B:错

8、多选题：
To compute the output of LTI system described by difference equation, the main methods involve in （ ）.

A:classical solution from time domain
B:solution from transform domain
C:recursive solution from time domain
D:computation using MATLAB

solution from transform domain;
recursive solution from time domain;
computation using MATLAB

9、判断题：
A discrete time sequence x(n) is developed by periodically sampling an analog signal xa(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.（ ）

A:对
B:错

10、判断题：
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.（ ）

A:对
B:错

11、单选题：
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.

A:Ⅰ、Ⅱ、Ⅲ
B:Ⅰ、Ⅱ
C:Ⅱ、Ⅲ
D:Ⅰ、Ⅲ