请教一个adc中snr的问题

neyee · 发表于 2009-12-3 16:47:26

有道理

neyee · 发表于 2009-12-3 16:59:16

回答的很好

lwjbh · 发表于 2009-12-6 09:42:00

准确的应该是Signal(dB)-noise(dB)-10log10(M),signal和noise都是能量。

lcp7547 · 发表于 2009-12-7 13:44:09

看看在说

goat_xdg · 发表于 2009-12-7 14:20:04

13# lwjbh

最后带M的那一项该怎么理解呢

forever6269 · 发表于 2009-12-9 19:51:22

谢谢楼主的分享了！

zzhhll11 · 发表于 2010-3-9 20:14:00

同问啊。。。。。

fc3s007 · 发表于 2010-9-22 20:39:26

都看不懂耶

hushuoqiu · 发表于 2010-9-23 00:36:12

to calculate the power on one specific frequency, fft needs to know the information of all sampled points on time domain which is impossible physically. usually, only part of real signal will be used. this is expressed as the points involved in fft (256,512,1024,etc.). it is equivalent to say that the signal processed by fft is a windowed version of original one. so of course the spectrum will be different if you dun consider used points.

zjzhang1124 · 发表于 2010-9-23 02:26:13

学习了

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请教一个adc中snr的问题

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