I know i have to calculate, but how much I set Eb/N0 to? Now i think it should be set to 1.
----- Original Message ----
From: George Nychis <address@hidden>
To: Bill Stevenson <address@hidden>
Cc: address@hidden
Sent: Monday, April 14, 2008 12:00:45 AM
Subject: Re: [Discuss-gnuradio] two questions about the general communication system
Read not only the document that I sent you, but the document that Brian
sent you too. You can lead a horse to water, but you can't make it drink.
Both docs tell you have to make the calculation.
- George
Bill Stevenson wrote:
>
>
> ----- Forwarded Message ----
> From: Bill Stevenson <
address@hidden>
> To: George Nychis <
address@hidden>
> Sent: Sunday, April 13, 2008 11:58:08 PM
> Subject: Re: [Discuss-gnuradio] two questions about the general
> communication system
>
> I meant: i was just simulating a simple communication system using
> GnuRadio, and i just have the transmitted bits connected with a noise
> source (gr.noise_source_c(gr.GR_GAUSSIAN,
noise_voltage)). Now the only
> thing left is the bit energy. :) Thank you!!!
>
> Bill
>
> ----- Original Message ----
> From: George Nychis <
address@hidden>
> To: Bill Stevenson <
address@hidden>
> Cc:
address@hidden> Sent: Sunday, April 13, 2008 11:50:41 PM
> Subject: Re: [Discuss-gnuradio] two questions about the general
> communication system
>
> So... if the noise channel is on your laptop, you must have generated
> this channel? Is it a simulated channel? Are you specifying the
noise
> power?
>
> You're not giving us much information.
>
> - George
>
>
> Bill Stevenson wrote:
> > Thank you! What i am trying to do is very simple: I don't use USRP, i
> > just used a vector as a bit source and have it modulated and transmitted
> > through a noise channel (on my laptop ^.^ ). Now i can set the value of
> > noise's amplitude, but there seems to be no way to determine the bit
> > energy! How to get it? Thank you!!!
> >
> > Bill
> >
> > ----- Original Message ----
> > From: Daniel Halperin <
address@hidden > <mailto:
address@hidden>>
> > To: Brian Padalino <
address@hidden <mailto:
address@hidden>>
> > Cc: Bill Stevenson <
address@hidden > <mailto:
address@hidden>>;
address@hidden > <mailto:
address@hidden>
> > Sent: Sunday, April 13, 2008 8:18:14 PM
> > Subject: Re: [Discuss-gnuradio] two questions about the general
> > communication system
>
>
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > On Apr 13, 2008, at 1:28 PM, Brian Padalino wrote:
> > > On Sun, Apr 13, 2008 at 2:38 PM, Bill Stevenson
> > > <
address@hidden <mailto:
address@hidden>
> <mailto:
address@hidden <mailto:
address@hidden>>>
>
wrote:
> > >>
> > >> Thank you George!
> >
>>
> > >> I am just wondering when we calculate BER, how can we determine the
> > >> value of
> > >> bit energy? Thank u!
> > >
> >
> > If you look through the relevant emails on the list, it seems no one
> > really understands the translation between the short values from the
> > USRP and absolute energy --- ADC and processing behavior complicate
> > the issue. However, it is much easier to estimate the ratio of Signal
> > to Noise --- this is a relative quantity. Just figure out receiver
> > power in the absence of a signal and in the presence of one...
> >
> > - -Dan
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v1.4.8 (Darwin)
> >
> >
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> > 1zcAn36qQQCkWJHOMhK10RERFA7B3hZo
> > =1lA0
> > -----END PGP SIGNATURE-----
> >
> >
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