Design of complex allpass filters
A. Fernandez-Vazquez, Gordana Jovanović Doleček · 2004
The paper presents the design of complex allpass filters that satisfy a desired degree of flatness and a desired phase at any specified frequency point. The set of linear equations are derived based on the specifications of the flatness and the values of the phase at the given frequency points. The filter coefficients are obtained by solving this set of equations.