function y=swerling2pu(n)
%由數據量為n的高斯白噪聲產生向量為n，功率譜為高斯型的斯維凌II型隨機向量
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%
r=6;
[z1,z2]=gaussian(n);
x1=gaussianpu(z1);
x2=gaussianpu(z2);
y=x1.^2+x2.^2;
y=r*y;
b=canshu(y);
y=y-b(1);     %去掉直流分量
%y=conv(y,y);
%y=fft(y);
%y=abs(y);
%i=1:2*n-1;
%plot(i,y)
%plotpu(y)