Hi Marcus, Yes, after some trial with the provided OFDM .grc files of the GNU Radio, I agree with you on the flexibility of the occupied bins and pilot tones. However, I have an issue. When, I try FFT length input that is greater than 64, I get "<block ofdm_carrier_allocator_cvc (14)>]: Buffer too small for min_noutput_items" error. After a search in the forum I found your comment in https://lists.gnu.org/archive/html/discuss-gnuradio/2014-08/msg00223.html Could you please give more details on what needs to be changed. e.g., do we have to change the source code of the OFDM Carrier Allocator block?
I also have a general question. We have also seen DVB-T2 transmitter as a possible OFDM implementation with high data rate, but we were not able to find a DVB receiver implemented in GNU Radio. Is it available at this time? Thanks again for your previous responses! Best, Sinan On Tue, Mar 13, 2018 at 12:20 PM, Müller, Marcus (CEL) <muel...@kit.edu> wrote: > OFDMA is a higher-level concept. Since it doesn't really apply to > IEEE802.11, no, gr-ieee802-11 isn't the best place to add it to. > > Use GNU Radio's built-in OFDM framework. It's very flexible. From a > transmitter's point of view, OFDM is a MAC layer choice that only > affects the subcarriers used in every symbol, and you can perfectly > well define that with said framework. > On Tue, 2018-03-13 at 12:14 -0500, Yaşar Sinan Nasır wrote: > > Hi Marcus, > > > > Thanks for the reply. I have an additional question. Is it possible to > implement OFDMA on the top of the gr-ieee802-11 or I need to begin with > basics like benchmark OFDM or raw OFDM. If my intention is to implement > OFDMA, what would you recommend to begin with as a reference? > > > > Best, > > Sinan > > > > On Mon, Mar 12, 2018 at 1:00 PM, Müller, Marcus (CEL) <muel...@kit.edu> > wrote: > > > Hi Sinan, > > > > > > GNU Radio itself comes with an OFDM implementation. Since it's all > > > software defined Radio, it's totally agnostic of the bandwidth you use > > > it with, assuming sufficient compute power. > > > > > > Also, there's gr-ieee802-11 as you might have noticed, which implements > > > the WiFi PHY. > > > > > > Best regards, > > > Marcus > > > > > > On Mon, 2018-03-12 at 12:41 -0500, Yaşar Sinan Nasır wrote: > > > > Hello, > > > > > > > > I am wondering, is there any good reference implementation of > wideband OFDM (up to 20 MHz) available that you would recommend? > > > > > > > > Best, > > > > Sinan > > > > _______________________________________________ > > > > Discuss-gnuradio mailing list > > > > Discuss-gnuradio@gnu.org > > > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > >
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