Four-band paraunitary filter bank with integer-to-integer quaternionic multiplier
Marek Parfieniuk, Alexander Alexandrovich Petrovsky · 2005
An alternative structure for 4-channel paraunitary filter banks is derived. Integer-to-integer mapping is obtained using lifting schemes for quaternionic multipliers. The lifting decompositions are optimized to have coefficients of fractional magnitude. Numerical properties of the developed ladder structure are evaluated empirically to relate it to the known quaternionic lattice