Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
31 lines
920 B
Matlab
31 lines
920 B
Matlab
function chcap_siso_single_stream = capacity_siso_tab(SNR, M1)
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%Channel Capacity of SISO system with QAM modulation
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%M1=4;% QAM on first antenna
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N = 100000; % No of noise realizations
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%seed(1) = 13579;
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%seed(2) = 24680;
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%rand('state', seed(1));
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%randn('state', seed(2));
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h = exp(2*pi*1j*rand(1));
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N0=10^(-SNR/10);
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sigmasq_x1=1;
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[stream1]=sqrt(sigmasq_x1)*mapping(M1); %x1 1x648
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logsum_siso = 0;
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for s1=1:M1
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x1=stream1(s1);
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for k=1:N
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z=sqrt(N0)*sqrt(1/2).*(randn(1,1)+sqrt(-1)*randn(1,1));
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alpha_siso=h;
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y_siso=alpha_siso*x1+z;
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den_siso=exp((-1/N0)*norm(y_siso-alpha_siso*x1)^2);
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neu_siso=0;
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for g=1:M1;
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x1_dd=stream1(g);
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neu_siso=neu_siso+exp((-1/N0)*norm(y_siso-alpha_siso*x1_dd)^2);
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end
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logsum_siso=logsum_siso+log2(neu_siso/den_siso);
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end
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end
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chcap_siso_single_stream=log2(M1)-logsum_siso/(M1*N); % For SISO
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