Unable to perform assignment because the indices on the left side are not compatible with the size of the right side. Can anyone please help, Thanks in advance.

Error in UvsPs (line 39)
muo(i) = (-1./u).*log(((d1.^m)./(a.*n.*PsByN_0.*T.*u+d1.^m).*a)./(1-a));

clc
clear all;

d1=20;
d2=20;
n=10^-11.4;
m=2.7;
a=0.4;
T=1;
PsByN_0dB=[20:.01:40];                                                     
PsByN_0=10.^(PsByN_0dB/10);
UmaxdB = 15;
UmaxN_0=10.^(UmaxdB/10);

Qu=[-2:0.001:0];
QoS_Component_u=10.^(Qu);

for i=1:length(QoS_Component_u)
    u=QoS_Component_u(i);

    muo_sum(i)=0;  %Initialising mu_o equal to zero
    mui_sum(i)=0;  %Initialising mu_i equal to zero
    r1_sum(i)=0;
    r2_sum(i)=0;
   

for j=1:100

    hx1=(1/sqrt(2))*randn(1,1);
    hy1=(1/sqrt(2))*randn(1,1);
    h1=hx1.^2+hy1.^2; 

    hx2=(1/sqrt(2))*randn(1,1);
    hy2=(1/sqrt(2))*randn(1,1);
    h2=hx2.^2+hy2.^2;

    muo(i) = (-1./u).*log(((d1.^m)./(a.*n.*PsByN_0.*T.*u+d1.^m).*a)./(1-a));

    muo_sum(i)=muo_sum(i)+muo(i); %Summation of muo(i) 

    mui(i) = (1./u).*log(((-exp(u.*UmaxN_0).*(exp(-PsByN_0.*u)))./(u.*UmaxN_0+PsByN_0.*u)).*(PsByN_0.*u)-(PsByN_0.*u.*(exp(-PsByN_0.*u))).*(expint(u.*UmaxN_0+PsByN_0.*u))+(exp(-PsByN_0.*u))+((PsByN_0.*u).*(exp(-PsByN_0.*u))).*(expint(PsByN_0.*u))+(exp(u.*UmaxN_0))./((UmaxN_0./PsByN_0)+1));

    mui_sum(i)=mui_sum(i)+mui(i); %Summation of mui(i)

    r1(i) = log(1+(h1*PsByN_0)/(n*d1^m))*((1-a)*(T/2));

    r1_sum(i) = r1_sum(i)+r1(i); 

    r2(i) = log(1+(h2*muo(i))/(n*d2^m))*((1-a)*(T/2));

    r2_sum(i) = r2_sum(i)+r2(i); 

end

muo_avg(i) = muo_sum(i)/100; %Average 

mui_avg(i) = mui_sum(i)/100; %Average 

r1_avg(i) = r1_sum(i)/100;

r2_avg(i) = r2_sum(i)/100;

C(i) = min(r1_avg(i),r2_avg(i));
 
end 


loglog(QoS_Component_u,PsByN_0dB);
hold on;
grid on;

Answer 1

[Torsten]

muo(i) = (-1./u).*log(((d1.^m)./(a.*n.*PsByN_0(i).*T.*u+d1.^m).*a)./(1-a));

instead of

muo(i) = (-1./u).*log(((d1.^m)./(a.*n.*PsByN_0.*T.*u+d1.^m).*a)./(1-a));

Same at several other locations within the j-loop.

The j-loop doesn't seem to make sense for me. What is its purpose ?

[Dhawal Beohar]

Thanks Torsten!