%
%取得脈壓系數
%

function myxs=myxs(b2,f)
f1=10e6;
b2=gf1(b2);                   %高放
b2=hunpin(b2,f1,0.2,0.6);   %混頻到10M
b2=hunpin(b2,f1,0.1,0.3);
% b2=hunpin(b2,20e6,0.1,0.3);
b2=4*b2;
[b2i,b2q]=xwjb(real(b2));
[b2i,fadi]=a2d(b2i,f);
[b2q,fadq]=a2d(b2q,f);
B2=b2i+j*b2q;
myxs1=fliplr(conj(B2));
myxs=fft(myxs1);