Thanks a lot!!!! Another question: It's possible to have adaptive modulation, that is the possibility to use different modulation for any subcarrier?
Bye Jacopo 2008/2/3, Thomas Rondeau <[EMAIL PROTECTED]>: > > Jacopo wrote: > > Thanks! But where can i check this parameter? > > > > Is it possible that fft_length= occupated carrier (--occupied-tones in > > blksimpl/ofdm.py) + un_used carrier ? Where can i set the position of > > the occupated_bins? > > > > bye > > To modify the bandwidth, you have to set the interpolation and > decimation rates. Yes, fft_length is the size of the FFT or total number > of subcarriers. Of this, only occupied-tones are used to carry data. The > unused carriers are distributed evenly on the carriers and you cannot > modify this behavior in the parameters currently, i.e., we do not > support non-contiguous OFDM. > > Tom > > > > 2008/2/2, Matt Ettus <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>: > > > > Jacopo wrote: > > > Hello I'm studing an OFDM implementation on gnuradio. I want to > > modify > > > benchmark_ofdm_tx.py. > > > > > > I have just read ofdm.py and trasmit_path.py but I can't find how > > > change some parameters. > > > > > > I'd want a bandwith of 20Mhz, where I can set this option? Where > > can I > > > set the carriers number? And the pilot bins? > > > > > > Is it possible to set an adaptive modulation for differents > carriers? > > > > The USRP hardware is not capable of bandwidths that high. You are > > best > > off staying around 6 MHz. > > > > Matt > > > -- www.fotofestefirenze.it
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