Filters Preserving Phase

In this chapter, linear phase and zero phase filters are defined and discussed.

---

Subsections

• Linear-Phase Filters
• Zero-Phase Filters
  • -Phase Filters
  • Phase in the Stopband
  • Example Zero-Phase Filter Design
  • Elementary Zero-Phase Filter Examples
  
  
• Odd Impulse Reponses
• Symmetric Linear-Phase Filters
  • Simple Linear-Phase Filter Examples
  • Software for Linear-Phase Filter Design
  
  
• Antisymmetric Linear-Phase Filters
• Forward-Backward Filtering
• Phase Distortion at Passband Edges

---

Order a Hardcopy of Introduction to Digital Filters

Previous: Pole-Zero Analysis Problems
Next: Linear-Phase Filters (Symmetric Impulse Responses)

---

written by Julius Orion Smith III
Julius Smith's background is in electrical engineering (BS Rice 1975, PhD Stanford 1983). He is presently Professor of Music and Associate Professor (by courtesy) of Electrical Engineering at Stanford's Center for Computer Research in Music and Acoustics (CCRMA), teaching courses and pursuing research related to signal processing applied to music and audio systems. See http://ccrma.stanford.edu/~jos/ for details.