Hi, I am bit confused b/w the two terms.I have read some material and i got the following relationship b/w the two: samples/second =samples/symbol * symbols/second And i think in GRC samples per symbol is 1(plz correct if i am wrong).So sample rate becomes equal to baud rate(symbols/second)?? Regards, Ali
on 2014-06-26 11:07
on 2014-07-01 11:19
On 06/26/2014 11:06 AM, jason sam wrote: > I am bit confused b/w the two terms.I have read some material and i > got the following relationship b/w the two: > samples/second =samples/symbol * symbols/second > And i think in GRC samples per symbol is 1(plz correct if i am > wrong).So sample rate becomes equal to baud rate(symbols/second)?? samples per symbol is whatever you set it to; common values are 2 and 4 (this also depends on the modulation used). Higher values are often used for demo purposes. M
on 2014-07-04 08:34
Thanx Martin,but where in GRC we can set samples per symbol??I am new to this so i don't know yet... Ali
on 2014-07-04 15:09
Hi Ali, as said several times: Sampling rate, samples per symbol etc are concepts that are meaningful only for certain blocks, and thus there is no sense in setting those globally. Greetings, Marcus
on 2014-07-04 17:39
Yes Marcus,u are r right and i am also asking about such blocks like the FM Mod block..In this block u have an option to set sample rate but how can u set samples per symbol??
on 2014-07-04 18:15
Not at all, because for these blocks, symbols have no meaning.
on 2014-07-05 10:00
Sorry for prolonging the discussion but I am a bit confused here.The sensitivity parameter for Freq Mod block is defined as: sensitivity = (pi * modulation_index) / samples_per_symbol where, modulation_index = deviation / (baud_rate / 2) So what values should i plug in for samples_per_symbol and baud_rate in the formulas?
on 2014-07-05 16:01
We might be talking about different blocks. I'm referring to gr::analog::frequency_modulator_fc, where the documentation only says radians/sample = amplitude * sensitivity From what you paste as formulas this does not look like the general frequency modulation, but like a digital modulation scheme, e.g. GMSK. Anyway, we will not be able to tell you what you'll need to use as parameters for your transmitter -- that is something that you, based on your communication engineering skills, will need to decide yourself. Sincerely, Marcus Müller http://gnuradio.org/doc/doxygen/classgr_1_1analog_...
on 2014-07-05 16:20
You may refer to this example to see how to transmit 9.6kbps GFSK signal through an AWGN channel. https://www.youtube.com/watch?v=N1hR6VgWeow&featur...
on 2014-07-05 17:38
ok thanx for the replies!
on 2014-07-05 20:02
Also, see http://gnuradio.org/redmine/projects/gnuradio/wiki... where some of my own questions have been answered. Very Respectfully, Dan CaJacob