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annotate m-toolbox/classes/+utils/@math/stnr.m @ 33:5e7477b94d94 database-connection-manager

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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
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1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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2 %
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3 % Compute Signal-to-Noise Ratio for temperature annealing in mcmc as
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4 % described in Neil J. Cornish et al (arXiv:gr-qc/0701167v1).
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5 % Returns SNR for each channel.
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6 %
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7 % - Inputs are -the outputs from both channels
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8 % -the inverse cross-spectrum matrix elements
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9 % -the template (arXiv:gr-qc/0701167v1)
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10 %
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11 % Karnesis 24-07-2011
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12 %
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13 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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14 function snrexp = stnr(tmplt1,tmplt2,out1,out2,InvS11,InvS22,InvS12,InvS21)
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15
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16 if tmplt2 == 0
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17 hs = 4*real(sum(abs(tmplt1.*(InvS11.*conj(out1)))));
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18 hh = 4*real(sum(abs(tmplt1.*(InvS11.*conj(tmplt1)))));
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19 snrexp = sqrt(2)*hs/sqrt(hh);
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20 else
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21 hs1 = 4*real(sum(abs(tmplt1.*(InvS11.*conj(out1) + InvS12.*conj(out2)))));
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22 hs2 = 4*real(sum(abs(tmplt2.*(InvS21.*conj(out1) + InvS22.*conj(out2)))));
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23
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24 hh1 = 4*real(sum(abs(tmplt1.*(InvS11.*conj(tmplt1) + InvS12.*conj(tmplt2)))));
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25 hh2 = 4*real(sum(abs(tmplt2.*(InvS21.*conj(tmplt1) + InvS22.*conj(tmplt2)))));
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27 %snrexp = [sqrt(2)*hs1/sqrt(hh1) sqrt(2)*hs2/sqrt(hh2)];
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28 snrexp = sqrt(2)*(hs1+hs2)/sqrt(hh1+hh2);
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