Article directory
1. Fourier transform, s-domain transform, z-domain transform (to be sorted out some commonly used and equation transformations)
Fourier transform
s-domain transformation
z-domain transformation
2. Exam papers
1. Multiple choice questions
1
D
2
D
3
B
4
A
5
B
6
D
7
A
8
C
9
B
10
f 1 ( t + 3 ) ∗ f 2 ( t − 1 ) f_1(t+3)*f_2(t-1) f1(t+3)∗f2(t−1)
11
B
12
D
13
B
14
B
15
C
16
A
17
See brief analysis of question 13
C
18
A
19
A
20
D
21
C
22
A
23
t 0 t_0 t0=1
D
24
C
25
See question 16
B
26
C
27
C
28
C
2. Fill in the blanks
1
2y(n);y(n-3);
2
See choice 13 and 6
Stablize
3
Linear characteristics, phase symmetry, left-right symmetry
5
{0,2,3,5,1}
6
1；2arctanw0
7
1024 * 10/2;1024 *10
8
Dispersion, convergence, harmonics
9
N 2 ; N ( N − 1 ) N^2;N(N-1) N2;N(N−1)
10
L;N/2
11
12
cyclical
13
IIR；FOR
14
15
Same as option 10
L;N/2
16
17
3. Calculation questions
1
2
3
(2)
2u(t)-3u(t-1)+u(t-2), differentiate it,
4
5
6
7
8
10
11
12
13
14
15
16
17
Question 1: Design Chebyshev-I(yi) type high-pass digital filter using bilinear transformation method
Question 2: Rp, Rs passband attenuation and stopband attenuation, wp and ws are the passband cutoff frequency and stopband cutoff frequency (write the numbers)
Wp1 and ws1 are pre-distortion
The Bilinear line is a bilinear transformation method converted into a digital filter.
3. Detailed knowledge points at the end of the semester
3.1 Basic knowledge points
3.2 Big questions
4. Some words about this subject
You must listen carefully to this course. But those are the knowledge points
时域、频域、s域、z域以及FIR滤波器和IIR滤波器and the big questions, so it’s relatively easy to review. The drawing questions are also super easy. For fill-in-the-blank choices, look at the examples. Remember to learn the formulas inside, and be able to draw inferences from one example, such as the formulas for the number of complex multiplications and complex additions of FFT and DFT, and so on. Come on, come on, I wish you in front of the screen good results.