Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
37 lines
1.1 KiB
Matlab
37 lines
1.1 KiB
Matlab
function [x1]=mapping(mod1)
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% mod1 = modulation on tx ant
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% x1 = symbol stream by tx antenna
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%QAM 4 constellation
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x_4=[-1 -1 1 1 ];
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y_4=[-1 1 -1 1 ];
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Qam4=x_4+y_4*j;
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Qam4=Qam4/sqrt(sum(abs(Qam4).^2)/4);
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% QAM 16 constellation
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x_16=[-1 -1 -1 -1 -3 -3 -3 -3 1 1 1 1 3 3 3 3 ];
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y_16=[-1 -3 1 3 -1 -3 1 3 -1 -3 1 3 -1 -3 1 3 ];
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Qam16=x_16+y_16*j;
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Qam16=Qam16/sqrt(sum(abs(Qam16).^2)/16);
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% QAM 64 constellation
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x_64=[-1 -1 -1 -1 -1 -1 -1 -1 -3 -3 -3 -3 -3 -3 -3 -3 -5 -5 -5 -5 -5 -5 -5 -5 -7 -7 -7 -7 -7 -7 -7 -7 1 1 1 1 1 1 1 1 3 3 3 3 3 3 3 3 5 5 5 5 5 5 5 5 7 7 7 7 7 7 7 7];
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y_64=[-1 -3 -5 -7 1 3 5 7 -1 -3 -5 -7 1 3 5 7 -1 -3 -5 -7 1 3 5 7 -1 -3 -5 -7 1 3 5 7 -1 -3 -5 -7 1 3 5 7 -1 -3 -5 -7 1 3 5 7 -1 -3 -5 -7 1 3 5 7 -1 -3 -5 -7 1 3 5 7];
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Qam64=x_64+y_64*sqrt(-1);
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Qam64=Qam64/sqrt(sum(abs(Qam64).^2)/64);
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% Modulating on antenna 1
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if mod1==4
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x1=Qam4;
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elseif mod1==16
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x1=Qam16;
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elseif mod1==64
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x1=Qam64;
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else
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display('Modulation selected is not available in the library');
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end
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