R INSTITUTE OF ARTIFICIAL INTELLIGENCE AND ROBOTICS. XJTU 86 (2)序列的移位 如果 DFS(n=X(k) 则有: DFSE(n+m)]=Wmk X(k) jmk X(R) 数字信号处理简明教程Institute of Artificial Intelligence and Robotics, XJTU 1986 数字信号处理简明教程 (2)序列的移位 ( ) ~ ( ) ~ DFS x n = X k ( ) ~ ( ) ~ ( ) ~ 2 e X k DFS x n m W X k mk N j mk N = + = − 则有: 如果