The fraction of the Nyquist zone occupied is equal to the number of active tones divided by the FFT length. The actual bandwidth then depends on your sampling rate.
MB On Wed, Mar 27, 2013 at 05:54:46PM +0800, Yingjie Chen wrote: > Hi guys, > > I wonder if there is any correlation between baseband bandwidth of > receiver side and fft-subcarriers-tounes of sender sider in OFDM? When > I set the bandwidth to 20Mhz in sender side, the spectrum analyzer of > receiver side shows only half of bandwidth（10Mhz). Does the reason > that I use 128fft and 64 subcarriers account for this phenomenon? > > Sent from my iPhone > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association
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