A design method of digital lattice allpass networks as linear phase subfilters for a class of approximately linear phase IIR filters is studied. Lattice parameters are directly used as variable parameters in a nonlinear optimization problem.A fast method based on iterative one-variable optimizations is also proposed for obtaining lattice parameters as initial values for the optimization algorithm.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.