AIR INSTITUTE OF ARTIFICIAL INTELLIGENCE AND ROBOTICS. XJTU 3.1.3Z变换的收敛域[*] ∑|x(n)z|=∑|x(n)r"e≤∑|xn)r"1 ∑|x(n)|r+∑|x(n) =∑|x(-m)|r+∑|x(n)|r"<∝ 两个和式为有限值,则无穷级数∑|x(n)z|也为有限值,即级数收敛。 ∑|x()2|≤M∑R"+∑Rr m=1 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 3.1.3 Z变换的收敛域 [**]