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【单选题】
要从抽样信号不失真恢复原连续信号,应满足下列条件的哪几条 ? 答 。 ( I ) 原信号为带限 II ) 抽样频率大于两倍信号谱的最高频率 ( III ) 抽样信号通过理想低通滤波器A.
I 、 II
B.
II 、 III
C.
I 、 III
D.
I 、 II 、 III
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