作者VortexSheet (Airfoil's视觉网志)
看板comm_and_RF
标题[问题] time limited and band limited
时间Wed Oct 14 20:09:38 2009
请问各位前辈
如何使用摺积来证明"a time limited signal cannot be band limited"?
假设现在有一个x(t)和一个rect(t/T)
麻烦各位高手了!
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 114.137.236.79
1F：→ coye:x(t) is time limited -> x(t)=y(t) x rect 114.32.230.250 10/15 02:13
2F：→ coye:X(f)=Y(f)*sinc, sinc is not limited 114.32.230.250 10/15 02:14
3F：推 kafai:那 Y(f) 呢？ 202.175.101.19 10/15 12:29
4F：推 kafai:原来是*，看错了 202.175.101.19 10/15 12:50