The impulse invariance method is only suitable for designing band-limited filters due to the frequency aliasing effect.

The impulse invariance method is only suitable for designing band-limited filters due to the frequency aliasing effect. A: 正确 B: 错误

Assuming that the frequency of the signal [img=31x25]180337767ae11c2.png[/img] is [img=81x23]1803377683e48f0.png[/img], if one samples the signal [img=49x25]180337768bcc185.png[/img], to avoid aliasing, what is the maximum of the sampling interval [img=34x22]180337769434696.png[/img]? A: [img=20x46]180337769c1020b.png[/img] B: [img=29x46]18033776a4a1b6f.png[/img] C: [img=29x46]18033776aee8f94.png[/img] D: [img=20x46]18033776b79a6b5.png[/img]