Re: [Discuss-gnuradio] discontinuous OFDM implementation?

[Tom Rondeau]

On Sun, Apr 25, 2010 at 11:54 PM, George Nychis <address@hidden> wrote:
>
>>
>> Do you mean discontinuous in time or frequency? If you're talking
>> about frequency (selectively turning off subcarriers, which I've heard
>> referred to as non-contiguous OFDM mostly), then there are definitely
>> a few implementations out there. I saw two groups at the latest IEEE
>> DySPAN conference demoing just such a system. I've been meaning to get
>> in touch with both groups to see if they would be willing to let us
>> take their updates to our OFDM code and put it in the tree.
>>
>
> In frequency, yep with subcarrier suppression.  That would be great to have
> with the rise of DSA in the GNU Radio branch.  Do you remember who exactly
> did the demo?  Was it "Software Defined Radio Implementation of SMSE Based
> Overlay Cognitive Radio"
>
> Their slides appear to have subcarrier suppression in them.  Reginald goes
> to school here, he's part of another wireless group.  I will poke him for
> the code :)
>
> - George

Yes, that was one of the teams. I met and talked a bit with
Bullmaster, but it sounded like Roulin was the one who did the actual
coding of that part.

The other team was from Aachen. They also implemented per-carrier
modulation, which is another useful trick to have for OFDM and DSA
apps.

Tom