On 22.05.2015 10:54, Michal Vaclík wrote:
> Yes, I am using default flowgraphs (examples) just adding Multiply Const
> block to avoid clipping due to high PAPR and obviously UHD blocks. Using
> FFT of 64 and default carrier configuration, sync does get better if I
> stretch this to wider bandwidths
Yes, I am using default flowgraphs (examples) just adding Multiply Const
block to avoid clipping due to high PAPR and obviously UHD blocks. Using
FFT of 64 and default carrier configuration, sync does get better if I
stretch this to wider bandwidths by setting higher sample rates at USRP.
2015-05-
On 20.05.2015 20:19, Michal Vaclík wrote:
> Hi, I am sorry for the delayed response.
>
> I checked the centering of the OFDM signal and it looks pretty good.
> Even looking at the signal's spectrum using SDR# on other computer was
> very nice - book-grade example of nicely shaped OFDM spectrum. To
Hi, I am sorry for the delayed response.
I checked the centering of the OFDM signal and it looks pretty good. Even
looking at the signal's spectrum using SDR# on other computer was very nice
- book-grade example of nicely shaped OFDM spectrum. Today I upgraded from
GNU Radio v 3.7.6.1 to 3.7.7.1 a
On 09.05.2015 15:47, Michal Vaclík wrote:
> Doesn't seem so - by connecting scope to DETECT port on S&C block I can
> see only randomly timed peeks as opposed to running with channel model
> where the peeks happen at fixed time periods.
>
> Detection seems to get better with higher sample rates.
Doesn't seem so - by connecting scope to DETECT port on S&C block I can see
only randomly timed peeks as opposed to running with channel model where
the peeks happen at fixed time periods.
Detection seems to get better with higher sample rates.
2015-05-09 23:25 GMT+02:00 Martin Braun :
> Is the
Is the detection working reliably?
M
On 09.05.2015 14:11, Michal Vaclík wrote:
> Hi,
> I am trying to implement OFDM transmitter and receiver (both in one
> flowgraph) using 2 USRP1s (both equipped with WBX). I have adjusted the
> signal so there's no peak above 1 and -1, but I am still failing a
Hi,
I am trying to implement OFDM transmitter and receiver (both in one
flowgraph) using 2 USRP1s (both equipped with WBX). I have adjusted the
signal so there's no peak above 1 and -1, but I am still failing at
syncrhonization. I used exmaples mentioned in Martin Braun's talk at FOSDEM
14 which ar
