main.m

对于天线的设计和应用进行了仿真,并进行了优化处理

close all
clear all
clc
% set parameter
M=80;
M2=M/10;
M3=M-M2;
T=20;
Pc=0.6;
Pm=0.004;
N=23;
Len=7;
Lenth=N*Len;
X=zeros(M,N);
Chro=round(rand(M,Lenth));
Chro1=zeros(1,Lenth);
X=DecodeChro(Chro,M,Lenth,N,Len);
X=round(X.*100/127);
MinFitness=zeros(1,T);
AveFitness=zeros(1,T);
for Gen=1:T
% Calculate Object fitness
X=DecodeChro(Chro,M,Lenth,N,Len);
X=round(X.*100/127);
Fitness=CalculateObjectValue(X,M,N);
Sum=sum(Fitness);
AveFitness(Gen)=Sum/M;
% select operation
[Cost,ind]=sort(Fitness);
MinFitness(Gen)=Fitness(ind(1));
Chro1=Chro(ind(1),:);
 Sel=ceil(rand(M3,1)*M);
 for j=1:M3
        if  Fitness(ind(M2+j)) > Fitness(Sel(j))
         ind(M2+j)=Sel(j);
    end
end
Chro=Chro(ind(1:M),:);    
% crossover operation
IndexPair=zeros(M,1);
for j=1:M
    IndexPair(j)=j;
end
for j=1:M
    Point=floor((M-j-1)*rand(1));
    Temp = IndexPair(j) ;
    IndexPair(j) = IndexPair( j + Point );
    IndexPair(j+Point) = Temp;
end
for j=1:2:(M-1)
   Randp=rand(1);
   if Randp<Pc
       P=ceil(rand(1)*(Lenth-Len));
           for k=P:(P+Len-1)
           Temp = Chro(j,k) ;
           Chro(j,k) = Chro(j+1,k) ;
           Chro(j+1,k) =Temp;
       end
   end
end

% mutation
for j=1:M
    for k=1:Lenth
        Randp=rand(1);
        if Randp<Pm
            if Chro(j,k)==1
                Chro(j,k)=0;
            else
                Chro(j,k)=1;
            end
        end
    end
end
Chro(M,:)=Chro1(1,:);
end
X=DecodeChro(Chro,M,Lenth,N,Len);
X=round(X.*100/127);
figure(1)
hold on
plot( MinFitness,'r'),
plot(AveFitness,'b');
hold off

Fitness1=CalculateObjectValue(X,M,N);
[Cost1,ind1]=sort(Fitness1);
BestX=zeros(1,N);
BestX=X(ind1(1),:);
BestValue=zeros(1,101);
    s=0;
    for u=0:0.01:1
        s=s+1;
        BestValue(1,s)=1+exp(i*100*pi*u);
        for n=1:N
            BestValue(1,s)=BestValue(1,s)+exp(i*(pi*BestX(1,n)*u));
        end
        BestValue(1,s)=abs(BestValue(1,s));
      
    end
figure(2)
    f=0:0.01:1;
    BestValue=BestValue./25;
    BestValue=20*log10(BestValue);
    plot(f,BestValue),grid;