www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/@singleton/todfasymfir.m
function Hd2 = todfasymfir(Hd); %TODFASYMFIR Convert to antisymmetric FIR. % Hd2 = TODFASYMFIR(Hd) converts discrete-time filter Hd to % antisymmetric FIR filter Hd2. % Copyright 1988-2002 The MathWorks, Inc. if ~isfir(Hd) error(message('signal:dfilt:singleton:todfasymfir:DFILTErr')); end [b,a] = tf(Hd); Hd2 = dfilt.dfasymfir(b/a(1));