Alias Protection, Filters and Filtering (199)
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Chapter Outline
Chapter 6 - Alias Protection, Filters and Filtering (DSP: Digital Signal Processing)
- Anti-Alias Filters
- Sampling Theory .. Review
- Brick-Wall vs Real Filters
- Aliasing Analysis
- Anti-Alias Filters .. Hardware
- Complex Filter “Construction”
- Building a Filter
- How Filters Behave
- Group Delay
- “Classical” Filter Types
- Bessel Filters
- Butterworth Filters
- Bessel vs. Butterworth
- Modern Filters
- Elliptical Filters
- Elliptical vs. Butterworth
- “Constant-Delay” Filters
- Constant-Delay vs. Bessel
- Filter/Sample-Rate Tradeoffs
- Assumptions
- Physical Considerations
- Filter Cutoff Frequency
- Sampling Ratio
- The FR/FD Ratio
- Performance of Different Filters
- Sampling Ratios for Different Filters
- Removing Aliased Data
- Filter Cutoff Frequency Conventions
- Filter-System Design Details/Tradeoffs