Re: [Discuss-gnuradio] "Error rate" block with USRP

[Azza]

Tom Rondeau-2 wrote
> On Wed, Apr 16, 2014 at 2:06 PM, Azza <

> azza.ben.mosbah@

> > wrote:
> 
>> Tom Rondeau-2 wrote
>> > On Wed, Apr 16, 2014 at 10:57 AM, Azza <
>>
>> > azza.ben.mosbah@
>>
>> > > wrote:
>> >
>> >> Thank you.
>> >> I have taken out the throttle block and add an AGC block at the
>> receiver.
>> >> To proceed with the synchronization, should I use a Constellation
>> >> Receiver
>> >> block or a Polyphase Clock Sync block ?
>> >>
>> >> Kind regards,
>> >> Azza
>> >>
>> >
>> >
>> > You'll actually need both. AGC -> clock sync -> constellation receiver
>> > (phase/freq recovery and decoding).
>> >
>> > Also, please reply in-line with the rest of the message. By cutting off
>> > the
>> > other part of our conversation makes it difficult for others to follow
>> the
>> > thread.
>> >
>> > Tom
>>
>> Thank you.
>> I have added modifications to my flowgraph:
>> <http://gnuradio.4.n7.nabble.com/file/n47630/gnu-ber-modified.png>
>> But, I am still confused about minimum/maximum frequency deviation in the
>> Constellation Receiver block. How should it be set?
>>
>> Regards,
>> Azza
>>
> 
>  Those are settings to keep the frequency sync from walking away, in
> normalized frequency. +1 and -1 should work fine.
> 
> Tom
> 
> 
> Tom,
> 
> I still found BER=0.5, however the error output of the Constellation
> Receiver block gives 0.
> 
> Regards,
> Azza
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