function yn=MRC_Rake(Tao,Atten,rt,Dg,Tf,Ts,Num_Data,PN_code,ref_st)
%Tao--------path delays
%Atten------path attenuations
%rt---------received multipath signal
%Num_Data---表示未擴頻的數據個數
%Tf---------frame duation
%Ts---------sample period
%Dg----pulse duation
%ef_st---------local reference pulse,含占空比的波形，持續(xù)時間為Tf。
%算法是先將多徑對齊合并，再相關接收
n_path=length(Tao);%the number of multipath
com_wei=Atten./sum(Atten.*Atten);%the weigth values to be combined 
PN_len=length(PN_code);
cor_st=reshape(ref_st'*PN_code,1,[]);
cor_len=length(cor_st);
Total_samples=Num_Data*cor_len;
for i=1:n_path
    rx(i,:)=com_wei(i)*rt(round(Tao(i)/Ts):(Total_samples-1)+round(Tao(i)/Ts));%對接收信號的延時進行處理
end
%多徑合并
if n_path>1
    for i=1:n_path
        for j=1:Num_Data
            rx(i,(j-1)*cor_len+1:j*cor_len)=rx(i,(j-1)*cor_len+1:j*cor_len).*cor_st;
        end
    end
    rx=sum(rx);
else
    for j=1:Num_Data
            rx((j-1)*cor_len+1:j*cor_len)=rx((j-1)*cor_len+1:j*cor_len).*cor_st;
    end
end
%cor_xn=xn.*St;          %correlation processing
for j=1:Num_Data
    int_xn(j)=Ts*sum(rx((j-1)*cor_len+1:j*cor_len));   %在一個脈沖持續(xù)時間Dg內積分
end
yn=int_xn>0;