数字滤波
零相位滤波、中位数滤波、叠加滤波、传递函数表示 ***低通、高通、带通和带阻滤波器多通道数据，无需设计滤波器或补偿延迟。执行零相位滤波以消除延迟和相位失真。使用中位数或 Hampel 滤波以消除峰值和离群值。将传递函数转换为不同表示形式，如二阶节或极点和零点。
APP
| 信号分析器 | 可视化和比较多个信号和频谱 |
|---|
函数
滤波函数
| bandpass | Bandpass-filter signals |
|---|---|
| bandstop | Bandstop-filter signals |
| highpass | Highpass-filter signals |
| lowpass | Lowpass-filter signals |
| fftfilt | FFT-based FIR filtering using overlap-add method |
| filter | 1 维数字滤波器 |
| filter2 | 二维数字滤波器 |
| filtfilt | Zero-phase digital filtering |
| filtic | Initial conditions for transposed direct-form II filter implementation |
| hampel | Outlier removal using Hampel identifier |
| latcfilt | Lattice and lattice-ladder filter implementation |
| medfilt1 | 1-D median filtering |
| residuez | Z-transform partial-fraction expansion |
| sgolayfilt | Savitzky-Golay filtering |
| sosfilt | Second-order (biquadratic) IIR digital filtering |
卷积
| conv | 卷积和多项式乘法 |
|---|---|
| conv2 | 二维卷积 |
| convmtx | Convolution matrix |
| deconv | 去卷积和多项式除法 |
线性系统变换
| cell2sos | Convert second-order sections cell array to matrix |
|---|---|
| eqtflength | Equalize lengths of transfer function numerator and denominator |
| latc2tf | Convert lattice filter parameters to transfer function form |
| sos2cell | Convert second-order sections matrix to cell array |
| sos2ss | Convert digital filter second-order section parameters to state-space form |
| sos2tf | Convert digital filter second-order section data to transfer function form |
| sos2zp | Convert digital filter second-order section parameters to zero-pole-gain form |
| ss | Convert digital filter to state-space representation |
| ss2sos | Convert digital filter state-space parameters to second-order sections form |
| ss2tf | 将状态空间表示形式转换为传递函数 |
| ss2zp | Convert state-space filter parameters to zero-pole-gain form |
| tf | Convert digital filter to transfer function |
| tf2latc | Convert transfer function filter parameters to lattice filter form |
| tf2sos | Convert digital filter transfer function data to second-order sections form |
| tf2ss | Convert transfer function filter parameters to state-space form |
| tf2zp | Convert transfer function filter parameters to zero-pole-gain form |
| tf2zpk | Convert transfer function filter parameters to zero-pole-gain form |
| zp2sos | Convert zero-pole-gain filter parameters to second-order sections form |
| zp2ss | Convert zero-pole-gain filter parameters to state-space form |
| zp2tf | Convert zero-pole-gain filter parameters to transfer function form |
| zpk | Convert digital filter to zero-pole-gain representation |
主题
用 Signal Processing Toolbox 软件对数据进行滤波
- 使用命令行函数或交互式 App 设计和实现滤波器。
Anti-Causal, Zero-Phase Filter Implementation
- Eliminate the phase distortion introduced by an IIR filter.
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。
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.
离散时间系统模型
- 了解表示数字滤波器的不同方案。
Linear System Transformations
- Convert between various representational schemes for digital filters.
Human Activity Recognition Simulink Model for Smartphone Deployment (Statistics and Machine Learning Toolbox)
- Generate code from a classification Simulink® model prepared for deployment to a smartphone.