Regarding your other question I think the following line in GMSK.py does the
work.

# Turn it into NRZ data.
    self.nrz = gr.bytes_to_syms()

Each byte is converted to a symbol of -1 or +1.  I do not know any more
detail. Correct me if I am wrong.

Thanks
Ali



On Tue, Sep 9, 2008 at 3:56 AM, Murtuza <[EMAIL PROTECTED]> wrote:

> Look into the directory
> /usr/local/lib/python2.x/site-packages/gnuradio/blks2impl/ . It has many
> modulation schemes already implemented in Gnuradio. GMSK is infact the
> default scheme but one can choose various other provided in this directory.
>
> Bye
> Ali
>
> On Mon, Sep 8, 2008 at 11:34 PM, Dumezie Maduike <[EMAIL PROTECTED]>wrote:
>
>> Hello all,  I'm new to GNU Radio and was wondering what kind of modulation
>> schemes were available.  I know that GMSK is the default scheme for the
>> "..digital/benchmark_tx.py" file.  I saw that the schemes are derived from
>> the "modulation_utils" file.  I'm not sure the available options though.
>>
>> Also, when the benchmark_tx.py script transmits from a file, how does the
>> data in the file get transmitted.  For example if file.dat is transmitted
>> with contents "5123645AY...", are these converted to binary 1's and 0's
>> using ASCII or Hex conversion and then modulated and transmitted?
>>
>> Any help will be greatly appreciated.  Thanks all.
>>
>> Dumezietho
>>
>>
>>
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> Discuss-gnuradio@gnu.org
>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>
>
>
>
> --
> Mir Murtuza Ali
> Graduate Student
> Center for Wireless Communications
> University of Mississippi
> University, MS 38677
> Ph : (M) 662-202-5472 , (R) 662-513-9903
>



-- 
Mir Murtuza Ali
Graduate Student
Center for Wireless Communications
University of Mississippi
University, MS 38677
Ph : (M) 662-202-5472 , (R) 662-513-9903
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