Re: [Discuss-gnuradio] OFDM on USRP2

[Josh Blum]

On 01/17/2011 11:31 AM, Veljko Pejovic wrote:
> Hi,
> 
> I updated the OFDM example. You can find it at
> http://www.cs.ucsb.edu/~veljko/downloads/ofdm_example.tar.gz
> 
> It supports both USRPs and the UHD driver. I get pretty bad
> performance with UHD receiver for some reason. Any ideas?
>

For the UHD performance issue, which model usrp? The following applies
to usrp2:

Was the bad performance on a transmit + receive application? There was
an issue where if receive was not keeping up, the transmit flow control
could be hampered; this is fixed on next branch.

Or was it receive only? And in any case did UHD print and warnings about
buffer sizes? Because it needs sysctl permission to allocate a large
enough receive buffer.

-josh

> 
> Cheers,
> 
> 
> Veljko
> 
> 
> On Tue, Jan 11, 2011 at 9:26 PM, Guanbo <address@hidden> wrote:
>>
>> Hi,
>>
>> I was looking for the source codes through the list.
>> And I got one from Veljko from UCSB, who are very nice to share his codes,
>> "ofdm_example.tar.gz"
>> The codes are attached.
>> Given the enough gain in TX and RX, you can see the output result at RX.
>>
>> Guanbo
>> http://old.nabble.com/file/p30650478/ofdm_example.zip ofdm_example.zip
>>
>>
>> mrahaim wrote:
>>>
>>>
>>> Hi all,
>>>
>>> Does anyone know of any updated OFDM benchmark code that is modified to
>>> be run on a USRP2?  I have seen previous posts of this, however the
>>> link to the updated code is no longer available.
>>>
>>> Thanks,
>>>
>>> Michael Rahaim
>>> Graduate Research Assistant
>>> Smart Lighting Engineering Research Center
>>> Boston University
>>> address@hidden
>>>
>>>
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> address@hidden
>>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>
>>>
>>
>> --
>> View this message in context: 
>> http://old.nabble.com/OFDM-on-USRP2-tp30638994p30650478.html
>> Sent from the GnuRadio mailing list archive at Nabble.com.
>>
>>
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> 
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