cirshftt.m

来自「the file contain many matlab signal sour」· M 代码 · 共 17 行

function y=cirshftt(x,m,N)
% Circular shift of m samples wrt size N in sequence x:(time domain)
% -----------------
% [y]=cirshftt(x,m,N)
% y=output sequence containing the circular shift
% x=input sequence of length<=N
% m=sample shift
% N=size of circular buffer
% Method:y(n)=x((n-m) mod N)
% Check for length of x
if length(x)>N
    error('N must be >=the length of x')
end 
x=[x zeros(1,N-length(x))];
n=[0:1:N-1];
n=mod(n-m,N);
y=x(n+1);