Sorry! Below was a typo! Eb should be set to1, I think. Thank you Bill
----- Original Message ---- From: Bill Stevenson <[EMAIL PROTECTED]> To: discuss-gnuradio@gnu.org Sent: Monday, April 14, 2008 12:27:58 AM Subject: Re: [Discuss-gnuradio] two questions about the general communication system Thank u George!!! I know i have to calculate, but how much I set Eb/N0 to? Now i think it should be set to 1. Bill ----- Original Message ---- From: George Nychis <[EMAIL PROTECTED]> To: Bill Stevenson <[EMAIL PROTECTED]> Cc: discuss-gnuradio@gnu.org 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 <[EMAIL PROTECTED]> > To: George Nychis <[EMAIL PROTECTED]> > 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 <[EMAIL PROTECTED]> > To: Bill Stevenson <[EMAIL PROTECTED]> > Cc: discuss-gnuradio@gnu.org > 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 <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> > > To: Brian Padalino <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>> > > Cc: Bill Stevenson <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>>; discuss-gnuradio@gnu.org > <mailto:discuss-gnuradio@gnu.org> > > 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 > > > <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>> > 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) > > > > iEYEARECAAYFAkgCosYACgkQy9GYuuMoUJ5Y0wCeOCwmgH5VQvjZpr4R5BQ1njxE > > 1zcAn36qQQCkWJHOMhK10RERFA7B3hZo > > =1lA0 > > -----END PGP SIGNATURE----- > > > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! 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