On Mon, May 30, 2011 at 5:05 AM, vanITA1082
<address@hidden> wrote:
Dear Tom,
Do you mind sharing your code for usrp n210 ?
I am new on gnuradio and usrp and I am not able to find a python example to
perform packet transmission.
Thank you
Vanessa
You can find lots of examples from my gr_apps github repo:
For direct cloning:
Note, some of these are just basic utilities while others are more "works-in-progress" type projects.
Tom
Tom Rondeau wrote:
>
> On Mon, Jan 17, 2011 at 2:48 PM, Josh Blum <address@hidden> wrote:
>>
>>
>> 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
>
>
> I found issues with the UHD code in setting the sample rates. When you
> set the sample rate, the best thing to do is ask the UHD device what
> the real sample rate it was actually set to. I then use a PFB arb
> resampler to adjust to the actual sample rate that I want.
>
> I was playing around with some FM signals and found that I couldn't
> get anything clean out until I did this, even though I was setting
> what I thought was a standard sample rate (that is, an integer
> decimation of the clock) to my N210. What I asked for and what I set
> were only off by a little bit, but it makes a huge difference in
> performance for FM signals.
>
> That said, we should be adjusting for this in the OFDM code, but it's
> something to keep in mind.
>
> Tom
>
>
>>>
>>> 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
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>>>>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>>>
>>>>>
>>>>
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>>>>
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