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 % 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);
