param_expand_nm.m

用于模拟时变非平稳的ARMA过程

function Cnm= param_expand_nm(Cml, N)
% function Cnm= param_expand_nm(Cml, N)
%   This file is part of the TFPM toolbox v1.0 (c)
%   [e-mail] and underlies the GPL.
% 
% Expands the TFAR/MA coefficient matrix Cml into time-varying 
% parameter matrix Cnm. 

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if(0)% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
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clear;tfpm;
MAR  =   7;
LAR  =   0;
MMA  =   5;
LMA  =   3;
N    =  64;
re_im= 'i';
mo_no= 'm';
tfpm_file_gen;
%-------------
Cml= Aml;
alpha= 1/2;
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end;% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
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% Dimensions:
[M, L]= param_dim(Cml);
Cnm= ifft([Cml(L+1:2*L+1, :); zeros(N-2*L-1, M+1); Cml(1:L, :)])*N;

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if(0)% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
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figure(98);plot(real(Cnm))
figure(99);plot(imag(Cnm))
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end;% TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
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