[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] Question about ofdm_sync_long block of gr-ieee802
Re: [Discuss-gnuradio] Question about ofdm_sync_long block of gr-ieee802-11 module
Mon, 11 May 2015 06:29:59 +0200
> On 10 May 2015, at 04:21, Jeon <address@hidden> wrote:
> I missed one another thing.
> `if(((d_count + o) % 64) == 0)` statement in
> Is this because of a length of an OFDM signal being a multiple of 64, which
> is the number of subcarriers? (Except cyclic prefix)
Yes, the next step is the FFT that works on blocks of 64 samples. The line you
quoted is executed when a new frame is about to start. It’s to ensure that the
new frame starts at a multiple of 64 samples.