Design of two-channel equiripple FIR linear-phase quadrature mirror filters using the vector space projection method. - Khalil C. Haddad; Henry Stark; Nikolas P. Galatsanos (IEEE Signal Process. Lett., 1998)

Design of digital linear-phase FIR crossover systems for loudspeakers by the method of vector space projections. - Khalil C. Haddad; Henry Stark; Nikolas P. Galatsanos (IEEE Trans. Signal Process., 1999)

Allpass filter design using projection-based method under group delay constraints. - Khalil C. Haddad; Yongyi Yang; Nikolas P. Galatsanos; Henry Stark (ICASSP, 2001)