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Re: [Discuss-gnuradio] misterious symetrical signal

From: Tom Rondeau
Subject: Re: [Discuss-gnuradio] misterious symetrical signal
Date: Tue, 27 Nov 2012 09:34:46 -0800

On Tue, Nov 27, 2012 at 8:31 AM, nexy_sm <address@hidden> wrote:
Hallo people,

During my adventure of designing 433MHz receiver i have recently discovered
misterious simetrical signal which I am not able to explain to myself. I am
using USRP1 with WBX daughter board. While observing complex baseband
signal, I realized that depenting on RF gain I have a signal simmetrical to
the transmitted signal. I have also attached a photo.

Hope that you have some explanation.


Looks like the effects of IQ imbalance.

I didn't read this closely, but this page looks like a pretty good explanation:


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