function [repbits]=cp0201_repcode(bits,Ns)
numbits = length(bits);
temprect=ones(1,Ns);
temp1=zeros(1,numbits*Ns);
temp1(1:Ns:1+Ns*(numbits-1))=bits;
temp2=conv(temp1,temprect);
repbits=temp2(1:Ns*numbits);