Re: [Discuss-gnuradio] modulation and demodulation

[yyzhuang]

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



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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