Re: [Discuss-gnuradio] difference b/w sample rate and symbols per second

[jason sam]

ok thanx for the replies!

On Sat, Jul 5, 2014 at 7:19 PM, Vanush Vaswani <address@hidden> wrote:
> 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&feature=youtu.be
>
>
>
> On Sun, Jul 6, 2014 at 12:00 AM, Marcus Müller <address@hidden> wrote:
>> We might be talking about different blocks.
>> I'm referring to gr::analog::frequency_modulator_fc, where the
>> documentation only says[1]
>>
>> 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
>>
>> [1]http://gnuradio.org/doc/doxygen/classgr_1_1analog_1_1frequency__modulator__fc.html#a9c252eeb8c9daf6ccd50427d3bc55bd3
>>
>> On 05.07.2014 09:59, jason sam wrote:
>>> 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 Fri, Jul 4, 2014 at 9:14 PM, Marcus Müller <address@hidden> wrote:
>>>> Not at all, because for these blocks, symbols have no meaning.
>>>>
>>>> On 04.07.2014 17:38, jason sam wrote:
>>>>> 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 Fri, Jul 4, 2014 at 6:08 PM, Marcus Müller <address@hidden> wrote:
>>>>>> 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 04.07.2014 08:33, jason sam wrote:
>>>>>>> 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 Tue, Jul 1, 2014 at 2:18 PM, Martin Braun <address@hidden> wrote:
>>>>>>>> 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
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Discuss-gnuradio mailing list
>>>>>>>> address@hidden
>>>>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>>>>> _______________________________________________
>>>>>>> Discuss-gnuradio mailing list
>>>>>>> address@hidden
>>>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>>>> _______________________________________________
>>>>>> Discuss-gnuradio mailing list
>>>>>> address@hidden
>>>>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>
>>
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> address@hidden
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio