www.pudn.com > ica_cdma.rar > pn_generate.m

function seq=pn_generate(connections) 
m=length(connections); 
len_chip=2^m-1; 
registers=[zeros(1,m-1),1]; 
seq(1)=registers(m); 
for i=2:len_chip 
    new_reg_cont(1)=connections(1)*seq(i-1); 
    for j=2:m 
        new_reg_cont(j)=xor(registers(j-1),connections(j)*seq(i-1)); 
    end 
    registers=new_reg_cont; 
    seq(i)=registers(m); 
end