第七章单元测试
- A widely used approach to IIR filter design is based on the conversion of a prototype analog transfer function to a digital transfer function.（ ）
- Digital filters are very important part of DSP, which has two uses: signal separation and signal restoration.（ ）
- For a practical digital filter, the magnitude response in the passband and in the stopband are of no any acceptable tolerances. （ ）
- The magnitude frequency characteristic curve of a digital filter is shown in the below figure, indicating that the filter type is （ ）.
- For digital filter design, normalized bandedge frequencies need to be computed from specifications in Hz using the formula
.（ ） - As for the properties of the Butterworth low-pass filler, which are correct for the following statements？ （ ）
- The magnitude frequency response of Chebyshev filters is of equiripple characteristics in both the passband and stopband.（ ）
- By looking up the known table according to the order N , we can obtain the normalized transfer function Ha(p) , which is independent to 3dB cutoff frequency Ωc . （ ）
- As for the impulse invariance transformation of IIR digital filter, the analog frequencies and digital frequencies are related by linear relationship
.（ ） - The aliasing distortion is unavoidable in the impulse invariance transformation.（ ）
- As for the bilinear transformation of IIR digital filter, it is a many-to-one mapping relationship from s-plane to z-plane.（ ）
- As for the bilinear transformation of IIR digital filter, transform transfer function Ha(s) of analog filter into transfer function H(z) of digital filter by the formula （ ）.
A:对 B:错
答案:对
A:对 B:错
A:错 B:对
A:band-stop filter B:low-pass filter C:high-pass filter D:band-pass filter
A:对 B:错
A:The 3-dB bandwidth is unrelated to the filter order. B:The magnitude response is a monotonically decreasing. C:The DC gain of the filter is unity for any order D:As the filter order increases, the characteristics become sharper.
A:对 B:错
A:错 B:对
A:错 B:对
A:错 B:对
A:对 B:错
A:
B:
C:
D:
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