Florian Kaltenberger
996ecbe55c
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5153 818b1a75-f10b-46b9-bf7c-635c3b92a50f
26 lines
771 B
Matlab
26 lines
771 B
Matlab
function [sig,sig_length] = QAM_MOD(size,input)
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% sig - output symbols
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% size - modulation size (4,16,256)
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% input - vector of bytes to be modulated
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AM2 = [-1 1];
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AM4 = [-3 -1 1 3]; AM4 = 2*AM4/sqrt(AM4*AM4');
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AM16 = [-15 -13 -11 -9 -7 -5 -3 -1 1 3 5 7 9 11 13 15]; AM16 = 4*AM16/sqrt(AM16*AM16');
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sig = zeros(1,length(input));
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sig_length = length(input);
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for l=1:length(input)
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if (size == 256)
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sig(l) = (AM16(1+ floor((input(l)/16))) + sqrt(-1)*AM16(1+rem(input(l),16)))/sqrt(2);
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elseif (size == 16)
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sig(l) = (AM4(1+rem(floor(input(l)/4),4)) + sqrt(-1)*AM4(1+rem(input(l),4)))/sqrt(2);
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elseif (size == 4)
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sig(l) = (AM2(1+rem(floor(input(l)/2),2)) + sqrt(-1)*AM2(1+rem(input(l),2)))/sqrt(2);
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end
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end
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