fit_it_block_ar4

PURPOSE ^

SYNOPSIS ^

function [PSD,operador,coef_ar] = fit_it_block_ar4(observado)

DESCRIPTION ^

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 
0002 function [PSD,operador,coef_ar] = fit_it_block_ar4(observado)
0003 
0004 M = size(observado,1);
0005 
0006 Y=[];
0007 rhs=[];
0008 
0009 bloque = observado;
0010 
0011 for jj=2:M-1
0012 for kk=2:M-1
0013    Y=[Y; bloque(jj+1,kk) bloque(jj,kk+1) bloque(jj-1,kk) bloque(jj,kk-1)];
0014    rhs =[rhs;bloque(jj,kk)];
0015 end
0016 end
0017 
0018 coef_ar = Y\rhs;
0019 
0020 ptos=M;
0021 
0022 w=linspace(-pi,pi,ptos);
0023 
0024 z1=exp(sqrt(-1)*w);
0025 z2=exp(sqrt(-1)*w);
0026 
0027 F = zeros(ptos);
0028 espectro = F;
0029 
0030 for jj=1:ptos
0031    for kk=1:ptos
0032       v1 = coef_ar(1)*z1(jj)^1;
0033       v2 = coef_ar(2)*z2(kk)^1;
0034       v3 = coef_ar(3)*z1(jj)^(-1);
0035       v4 = coef_ar(4)*z2(kk)^(-1);
0036 
0037       val = 1 - (v1 + v2 + v3 + v4);
0038       F(jj,kk) = val;
0039       PSD(jj,kk) = 1 / abs(val)^2;
0040    end
0041 end
0042 
0043 operador = F;

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