数字滤波器分析
分析滤波器的频域和时域响应。可视化复平面中的滤波器极点和零点。
函数
频域响应
时域响应
impz | Impulse response of digital filter |
impzlength | Impulse response length |
stepz | Step response of digital filter |
滤波器探查
filterAnalyzer | Analyze filters with Filter Analyzer app (自 R2024a 起) |
filtord | Filter order |
filternorm | 2-norm or infinity-norm of digital filter |
firtype | Type of linear phase FIR filter |
isallpass | Determine whether filter is allpass |
isfir | Determine if digital filter has finite impulse response |
islinphase | Determine whether filter has linear phase |
ismaxphase | Determine whether filter is maximum phase |
isminphase | Determine whether filter is minimum phase |
isstable | Determine whether filter is stable |
主题
- 频率响应
计算和显示 IIR 和 FIR 低通、高通和带通滤波器的频率响应。
- 相位响应
提取滤波器的相位响应。
- 群延迟和相位延迟
测量作为频率的函数的滤波器的平均时滞。
- 零极点分析
求线性系统的极点和零点并对其可视化。
- 冲激响应
生成并显示简单滤波器的冲激响应。
- 补偿 FIR 滤波器引入的延迟
使用索引来抵消滤波引入的时移。
- 补偿 IIR 滤波器引入的延迟
当使相位信息保持原样至关重要时,请去除滤波引入的延迟和失真。
精选示例
Speaker Crossover Filters
Devise a simple model of a digital three-way loudspeaker using Chebyshev Type I designs. Visualize the poles, zeros, and frequency responses of the filters.
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