Re: [Discuss-gnuradio] modulation and demodulation

[yyzhuang]

Thanks 

Oh yes the "-m" specifies the mod and demod. But the modulation seems
related to some other parameters, which I can't see with the "-h" option. We
can change the rate by --bitrate, but how about transmit power, and receiver
acquisition loop? 

BTW, does anybody have the correct parameters setting for DBPSK and DQPSK?
We are doing a project, the deadline is approaching. Thanks a lot. 

Yanyan


Tom Rondeau wrote:
> 
> yyzhuang wrote:
>> Hi,
>>
>> I'm pretty new in working with gnuradio. Could you please tell me a bit
>> of
>> detail about how to change  the symbol rate, transmit power, and receiver
>> acquisition loop (command line? the script code?) Thanks a ton!!
>>
>> Yanyan
>>   
> 
> We use OptionParser for all of our command-line applications which has 
> the neat attribute that you can use "-h" with the command. This will 
> print out the help page for any command-line program.
> 
> Tom
> 
> 
>> Tom Rondeau wrote:
>>   
>>> yyzhuang wrote:
>>>     
>>>> Hi All,
>>>>
>>>> We are trying to set different modulation and demodulation schemes in
>>>> gnuradio example tunnel.py. The default is gmsk, which works fine. But
>>>> when
>>>> we used -m dbpsk option, the two PCs can't ping each other (although
>>>> after
>>>> ifconfig setup, both sender and receiver have output like: Tx:
>>>> len(payload)
>>>> =  192 ). I looked through the script 
>>>>
>>>>     tb = my_top_block(mods[options.modulation],
>>>>                       demods[options.modulation],
>>>>                       mac.phy_rx_callback,
>>>>                       options)
>>>>
>>>> It should be ok if we specify a different modulation with -m, unless
>>>> there's
>>>> other settings needed. Can anybody help us with the problem? Thanks a
>>>> lot.
>>>>
>>>> Yanyan
>>>>   
>>>>       
>>> I have used DBPSK and DQPSK fine with tunnel.py. You will probably have 
>>> to play with the symbol rate, transmit power, and possibly the receiver 
>>> acquisition loop settings.
>>>
>>> Tom
>>>
>>>
>>>
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>>>
>>>
>>>     
>>
>>   
> 
> 
> 
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