www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/@filterquantizer/firdecimfootconnect.m
function [NL, PrevIPorts, PrevOPorts, NextIPorts, NextOPorts, mainparams]=firdecimfootconnect(q,NL,H,mainparams,decim_order) % Copyright 2005 The MathWorks, Inc. % Specify qparams %sum and gain for m=1:decim_order gainidx = m; set(NL.nodes(gainidx),'qparam','double'); sumidx = decim_order+m; set(NL.nodes(sumidx),'qparam','double'); end % connections for m=1:decim_order % connect delay to gains gainidx = m; delayidx = 2*decim_order+m; NL.connect(delayidx,1,gainidx,1); %connect gain to sum sumidx = decim_order+m; NL.connect(gainidx,1,sumidx,1); end % the port to previous and next stage NextIPorts=[]; PrevOPorts=[]; PrevIPorts=[]; for m=1:decim_order sumidx = decim_order + m; delayidx = 2*decim_order + m; if m == 1 NextOPorts = [filtgraph.nodeport(sumidx,1)]; else PrevOPorts = [PrevOPorts, filtgraph.nodeport(sumidx,1)]; end PrevIPorts = [PrevIPorts, filtgraph.nodeport(delayidx,1), filtgraph.nodeport(sumidx,2)]; end