Digital Filter Analysis
Analyze frequency- and time-domain responses of filters. Visualize filter poles and zeros in the complex plane.
Apps
| Filter Analyzer | View, analyze, and compare filters (Since R2024a) |
| Filter Designer | Design filters by choosing algorithm or specifying constraints |
Live Editor Tasks
| Create Plot | Interactively visualize filter responses and other outputs for several signal processing functions (Since R2023a) |
Functions
Topics
- Use Filter Analyzer App
Import or create filters, design, inspect, and export filter designs.
- STEP 1: Import Filters and Manage Sessions
- STEP 2: Manage and Analyze Filters
- Frequency Response
Compute and display frequency responses of IIR and FIR lowpass, highpass, and bandpass filters.
- Phase Response
Extract the phase response of a filter.
- Group Delay and Phase Delay
Measure the average time delay of a filter as a function of frequency.
- Zero-Pole Analysis
Find and visualize poles and zeros of a linear system.
- Impulse Response
Generate and display the impulse response of a simple filter.
- Compensate for the Delay Introduced by an FIR Filter
Use indexing to counteract the time shifts introduced by filtering.
- Compensate for the Delay Introduced by an IIR Filter
Remove delays and distortion introduced by filtering, when it is critical to keep phase information intact.
Featured Examples
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.
Take Derivatives of a Signal
Use a differentiator filter to differentiate a signal without amplifying the noise.
