www.pudn.com > space-timecodingBrankaVuceticJinhongYuan.rar > IT_C_to_num.m, change:2006-12-20,size:1109b

 
% in this programe a highly scattered enviroment is considered. The 
% Capacity of a MIMO channel with nt transmit antenna and nr recieve 
% antenna is analyzed. The power in parallel channel (after 
% decomposition) is distributed as water-filling algorithm 
 
clear all 
close all 
clc 
 
nt_V = [10:9:64]; 
nr_V = [2:2:14]; 
 
N0 = 1e-4; 
B  = 1; 
Iteration = 1e4; % must be grater than 1e2 
 
SNR_V_db = [0:5:30]; 
SNR_V    = 10.^(SNR_V_db/10); 
 
color = ['b';'r';'g';'k';'c']; 
notation = ['-o';'->';'<-';'-^';'-s']; 
 
for(k = 1 :length(nt_V)) 
    nt = nt_V(k); 
    nr = nr_V(k); 
    for(i = 1 : length(SNR_V)) 
        Pt = N0 * SNR_V(i); 
        for(j = 1 : Iteration) 
            H = random('rayleigh',1,nr,nt); 
            [S V D] = svd(H); 
            landas(:,j)  = diag(V); 
            [Capacity(i,j) PowerAllo] = WaterFilling_alg(Pt,landas(:,j),B,N0); 
        end 
    end 
 
    f1 = figure(1); 
    hold on 
    plot(nt_V,mean(Capacity')) 
    hold on 
    clear landas 
end 
f1 = figure(1) 
 
grid on 
set(f1,'color',[1 1 1]) 
xlabel('ÌìÏßÊýÁ¿n') 
ylabel('Capacity bits/s/Hz')