test.m

在cdma系統中在下行做功率控制的性能分析

for mobiles = 10:5:50

iterations = 1;
dmin = 200;
R = 1000;
k = 3;
n = 4;

counterinit('outage_counter');
counterset('outage_counter', 0);

for i = 1:iterations;
        power_initial = -73 ;
    
    for j = 1:mobiles;
        
        distance  = unidrnd (R,1,mobiles)
        
        if distance (j) <= dmin;
            
            power (j) = k* (dmin/R)^n;
        else 
            power (j) = k* (distance (j)/R)^n ;
        end
       
        SIR = (10*log10 (power (j)))
        SIR_threshold= -14;
        SIR_observed = SIR (j) 
      
         if SIR_observed < SIR_threshold
           counterinc('outage_counter');
         end
        
    end
       
        outage_counter = (counterval('outage_counter')) 
end

 outage_percentage = (( counterval('outage_counter') /mobiles)*100)
 
% plot(mobiles, outage_percentage);
 %title('Outage Probability vs Number of Mobiles - Distance Based Power Control Algorithm')
 %xlabel('Number of mobiles in cell')
 %ylabel('Percentage of mobiles in outage')
 
end