function kasami=kasami_seq(fbconnection)  %%%kasami序列
%          fbconnection=[1 0 0 0 0 1]
         mseq=m_sequence(fbconnection);
         N=2^length(fbconnection)-1;
         sample_period=2^(length(fbconnection)/2)+1;
         sample_seq=[];
         for sample_length=1:N/sample_period
             temp=mseq(sample_length*sample_period);
             sample_seq=[sample_seq temp];
         end
         mseq1=[];
         for sample_cyc=1:sample_period
             mseq1=[mseq1 sample_seq];
         end
         for shift_amount=0:N/sample_period-1
             shift_mseq2=[mseq1(shift_amount+1:N) mseq1(1:shift_amount)];
             kasami(shift_amount+1,:)=mod(mseq+shift_mseq2,2);
         end
         kasami(shift_amount+2,:)=mseq;