Re: Baseband signal generating.

[Md. Atiqur Rahman]

Hello, Thank you so much for your response. Yes, I get it.

I did multiply the result with the factor but I wanted to know how the constellation object setting defined it. 

Now I know that, thanks to Mr. Christophe and Mr. Marcus.

On Fri, Nov 15, 2019 at 1:20 PM Müller, Marcus (CEL) <address@hidden> wrote:

… 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
> >

--

Sincerely,

Md Atiqur Rahman

Hochschule Bremen