[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

From: Florian Schlembach
Subject: Re: [Discuss-gnuradio] OFDM Benchmark Tx Issue?
Date: Tue, 21 Feb 2012 19:06:26 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0) Gecko/20120129 Thunderbird/10.0

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

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.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]