Hi Qing, Your experience is exactly what I have tested. The data rate of OFDM based on the current GNURadio never exceeds 1Mbps with acceptable PER. I guess the only way to beat more bandwidth is to use very strong computer...
On Mon, Aug 6, 2012 at 10:12 AM, Qing Yang <yangqing0...@gmail.com> wrote: > Dear all, > > Recently we are building an OFDM communication system based on RawOFDM( > http://people.csail.mit.edu/szym/rawofdm/README.html). In the simplest > point-to-point > case, we use a pair of PC and USRP as the transmitter and use another pair > as the receiver. > > To reduce the influence of CFO, we need to run our system with large > bandwidth (like 802.11 at 20MHz). However, once we set the transmitting > bandwidth larger than 2MHz, the receiver's program will block there and > show "over-run" message later on (a screen of "O"s). For small bandwidth > (<2MHz), the receiver runs pretty well. > > Do you have similar experience? How can I make the OFDM receiver work with > 20MHz bandwidth? > > > > We use USRP N210. And the configuration of our PC is > Ubuntu release 10.10(maverick) kernel 2.6.35-22-generic GNOME 2.32.0 > Memory: 15.7GiB > Processor 0~7: Intel(R) Xeon(R) CPU E5620 @ 2.40GHz > > UHD version: UHD_003.004.000-c50bb91 image version 8 > gnuradio version: 3.4.x > > > Sincerely, > -- > Yang, Qing > Information Engineering, CUHK > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- Alex, *Dreams can come true – just believe.*
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