Sorting out noisy signals 4

[Danielsp]

I am a Civil Engineer who's just started in the field, so please bear with me here. It's quite simple stuff.

How can we separate different frequencies in a signal in such a way that the information modulated into a given frequency is preserved? I mean, if you use a passband filter around a target frequency, you average out many wave cycles of that frequency and all the information stored there is lost.

At least that's what happens with a FIR filter (I've tried) and I suppose IIR filters would have the same effect. So, is there a different kind of frequency filter that keeps modulation intact? I tried a PLL as well but the net effect is pretty much the same. How is that problem solved in real life?

Thanks in advance!

 

[Skogsgurra]

Not that I am aware about. S.C. is probably the closest I've left any marks. Not so sure what this is about. A political thing?

Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.

 

[IRstuff]

Dan was referring to the recent FIU pedestrian bridge collapse.
thread815-437029

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

faq731-376 forum1529 Entire Forum list

http://www.eng-tips.com/forumlist.cfm

 

[VEBill]

"...flag "Report" in the lower right corner. Well this thread is very close to being just that. And disappear."

Sigh...

Time and effort > /dev/null 2>&1

Perhaps we shouldn't bother at all.

 

[Skogsgurra]

No, Dan and IR. I haven't started my new career yet. But my teacher/mentor mentioned that he had been in Florida

VE1BLL, I am very liberal when it comes to impossible threads. But this one has not brought anything but confusion and frustration. We all learn, but the OP's conviction that "It's simple stuff' makes every effort go to the bit bucket.

Gunnar Englund

http://www.gke.org

--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

 

[VEBill]

If anyone finds that a given thread causes them frustration, then they're free to stop opening it. I take this approach all the time; it has much to recommend it.

The OP cannot fail to be learning from this thread. As well, some of the participants might have picked up a tidbit or two. And perhaps lurkers too.

 

[Skogsgurra]

It is not at all as simple as that, VE1BLL. And I think that you understand it, too.

Gunnar Englund

http://www.gke.org

--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.