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[Discuss-gnuradio] Identification of unknown signals?

From: Christian Gagneraud
Subject: [Discuss-gnuradio] Identification of unknown signals?
Date: Sat, 11 Aug 2012 20:22:39 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:14.0) Gecko/20120713 Thunderbird/14.0

Hi all,

While scanning some frequencies, I came across some digital signal in the 166-168MHz region that I would like to identify.
The baseband signals are narrow (5/10 kHz) using an unknown modulation.
I had a look at the constellation diagram and all I could see is a quite flat ellipse.

The spectrum at the beginning of the burst has 5 harmonics spaced by ca. 1.6KHz, and at the end of the bust it's just a single spike (and the IQ signals are almost pure sinus)

I would be grateful if someone could share tips about signal identification.


Christian Gagneraud,
Embedded systems engineer.
Techworks Marine
1 Harbour road
Dun Laoghaire
Co. Dublin
Tel: + 353 (0) 1 236 5990
Web: http://www.techworks.ie/

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