% 求多個用戶的誤碼率，調用annreceivex
hold on
BER_sum=zeros(1,11);
BER_ave=zeros(1,11);
for m=1:10
   snr_in_db=0:2:20;
   for i=1:length(snr_in_db);
       BER(i)=MF2(snr_in_db(i));
   end
   BER_sum=BER_sum+BER;
end;
BER_ave= BER_sum /10 
plot(snr_in_db,BER_ave,'bd-')