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Re: Baseband signal generating.


From: CEL
Subject: Re: Baseband signal generating.
Date: Fri, 15 Nov 2019 12:20:10 +0000

… and the easiest way to adjust that is by simply multiplying the
result with the appropriate factor

Best regards,
Marcus 
On Fri, 2019-11-15 at 13:06 +0100, Christophe Seguinot wrote:
> Hi 
> 
> Your amplitude is set in constellation object, in the constellation points 
> list. 
> 
> At present yours is +-1 for BPSK, and +-1+-j for QPSK
> 
> So amplitude is 1 (+-1) for BPSK and 1.414 for QPSK 
> 
> This must be adjusted to your requirements (-0.5,0.5) for BPSK
> 
> Regards 
> 
> 
> 
> On 15/11/2019 11:03, Md. Atiqur Rahman wrote:
> > Hello there, I am working on generating a baseband signal by using 
> > GNU-Radio. I have chosen a random signal along with the constellation 
> > modulator and constellation object. However, I go through all settings for 
> > these blocks but don't find the setting option for signal 'Amplitude'. How 
> > can I be sure that my generating amplitude (let say peak to peak)?
> > 
> > I can see the signal amplitude in QT GUI Time Sink but I am not sure how 
> > its amplitude define here in this scheme. It seems like signal amplitude is 
> > 2v peak to peak. Is it right? But I want to generate a baseband signal 
> > which will have 1v peak to peak.  Thank you.
> > 
> > -- 
> > Sincerely,
> > Hasan
> > 

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