How do I detect that a signal is a WIFI signal and not noise

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tch77_pt75

Joined: 22 Aug 2007
Posts: 27

03 Nov 2009 10:32 How do I detect that a signal is a WIFI signal and not noise

I am able to view the RF spectrum currently but how do I differentiate between a WIFI and noise signal?

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vfone

Joined: 10 Oct 2001
Posts: 2329
Helped: 327

03 Nov 2009 20:08 Re: How do I detect that a signal is a WIFI signal and not n

WIFI looks like this:

http://cp.home.agilent.com/upload/cmc_upload/80211g_spectrum.jpg

and noise looks like...noise

http://www.obb1.com/images/KiloArc-Optical-Noise-Graph.gif

tch77_pt75

Joined: 22 Aug 2007
Posts: 27

04 Nov 2009 1:18 Re: How do I detect that a signal is a WIFI signal and not n

If I have WIFI signal and noise transmit in the air, what will their results be when I performed the demodulation?

Also, how do their constellation plot look like?