Re: [Discuss-gnuradio] OFDM Benchmark Tx Issue?

[Florian Schlembach]

> There is a coarse and a fine frequency offset correction. The fine
> correct makes sure that the subcarrier is centered in the bin; the
> coarse adjusts for an integer number of subcarriers off from the center
> frequency. By default, the OFDM receiver will correct for some number of
> subcarrier bins (it's either +/-5 or +/-10; I can't remember). If your
> radios have a frequency offset that is greater than the maximum number
> of subcarriers specified here, the receiver cannot receive the symbols
> correctly.

How about the fine frequency offset correction? How can I turn it on? 
For instance, how do I have to modify the benchmark/tunnel scripts in 
order to do that?

> Yes, you can transmit a tone using uhd_siggen.py to fine out a rough
> estimate of the frequency offset and adjust either the transmitter or
> receiver based on this number.

Thanks, I will try that next days.