Operations on sequence Discrete-Time Signals and Systems--Digital Signal Processing 1.Signal addition Sample-by-sample addition *{x1(n)}+{x2(n)}={x1(n)+x2(n)} Function [y,n]=sigadd(x1,n1,x2,n2) n=min(min(n1),min(n2)):max(max(n1),max(n2)) y1=zeros(1,length(n));y2=y1; y1(find((n>=min(n1))&(n<=max(n1))==1))=x1; y2(find((n>=min(n2))&(n<=max(n2))==1))=x2; Y=y1+y2; 上游充通大学Operations on sequence Discrete-Time Signals and Systems —— Digital Signal Processing  1. Signal addition Sample-by-sample addition {x1(n)}+{x2(n)}={x1(n)+x2(n)} Function [y,n]=sigadd(x1,n1,x2,n2) n=min(min(n1),min(n2)): max(max(n1),max(n2)); y1=zeros(1,length(n)); y2=y1; y1(find((n>=min(n1)) & (n<=max(n1))==1))=x1; y2(find((n>=min(n2)) & (n<=max(n2))==1))=x2; Y=y1 + y2;