通讯编程文档

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Matlab

shenpowerallo.m：源码内容

							
function [p,outage]= shenpowerallo(channel,suballo,N,K,Ptot,noise,gamma)
for i=1:K
	n(i)=sum(suballo(i,:));   
end
for user=1:K
   used=[];
	for j=1:N
   	if suballo(user,j)>0
      	used=[used channel(user,j)];
   	end
	end
	usedlength=length(used);
	for i=1:length(used)
   	[minvalue minindex]=min(used);
   	usedordered(user,i)=minvalue;
   	used=[used(1:minindex-1) used(minindex+1:length(used))];
	end
   usedordered(user,:)=usedordered(user,:)/noise;	
   
   h(user)=usedordered(user,1);
   vtemp=0;
   for m=2:usedlength
   	vtemp=vtemp+(usedordered(user,m)-usedordered(user,1))/(usedordered(user,1)*usedordered(user,m));   
   end
   v(user)=vtemp;
   
   ytemp=1;
   for m=2:usedlength
   	ytemp=ytemp*usedordered(user,m)/usedordered(user,1);   
   end
   y(user)=ytemp;
   
end
coef(1)=1;
power(1)=1;
for i=2:K
    coef(i)=n(i)/(h(i)*y(i)^(1/n(i)))*(h(1)*y(1)^(1/n(1))/n(1))^(n(1)*gamma(i)/(n(i)*gamma(1)));
    power(i)=n(1)*gamma(i)/(n(i)*gamma(1));
end
infcheck=0;
for i=1:K
    if coef(i)==inf
        infcheck=1;
    end
end
if (infcheck==1)
   for i=1:K
      p(i)=Ptot/N*n(i);
   end
   outage=1;
   return;
end
fun=['x'];
for i=2:K
	fun=[fun,'+',num2str(coef(i)),'*x^',num2str(power(i))];   
end
for i=1:101
   guessx=0.01*(i-1)*Ptot;
   guess(i)=guessx;
   for j=2:K
   	guess(i)=guess(i)+coef(j)*guessx^power(j);   
   end
   
   guess(i)=guess(i)-Ptot;   
end
[guessvalue,guessindex]=min(abs(guess));
fun=[fun,'-',num2str(Ptot)];
p(1)=fzero(fun,0.01*(guessindex-1)*Ptot);
if isnan(p(1))==1
   for i=1:K
      p(i)=Ptot/N*n(i);
   end
   outage=1;
else 
   for i=2:K
      p(i)=coef(i)*p(1)^power(i);
   end
   outage=0;
end

						