www.gusucode.com > signal 工具箱matlab源码程序 > signal/@dfilt/@filterquantizer/firinterpfootconnect.m

    function [NL, PrevIPorts, PrevOPorts, NextIPorts, NextOPorts, mainparams]=firinterpfootconnect(q,NL,H,mainparams,interp_order)

% Copyright 2005 The MathWorks, Inc.

% Specify qparams

%sum and gain

for m=1:interp_order
    gainidx = m;
    set(NL.nodes(gainidx),'qparam','double');
    sumidx = interp_order+m;
    set(NL.nodes(sumidx),'qparam','double');
end



% connections
% connect gains to sum, note the last two gains connects to the same sum
% block (last one)
delayidx = 2*interp_order+1;
for m=1:interp_order
    gainidx = m;
    sumidx = interp_order + m;
    NL.connect(gainidx,1,sumidx,1);
    NL.connect(delayidx,1,gainidx,1);
end

% the port to previous and next stage
PrevOPorts=[];
NextIPorts=[];
PrevIPorts=[filtgraph.nodeport(delayidx,1)];
NextOPorts=[];
for m=1:interp_order
    sumidx = interp_order+m;
    PrevIPorts = [PrevIPorts, filtgraph.nodeport(sumidx,2)];
    NextOPorts = [NextOPorts, filtgraph.nodeport(sumidx,1)];
end