On 09/26/2017 02:31 PM, Ed Troy wrote:
> I finally got gnuradio and other stuff, like gr-iio and gr-radar
> installed in Ubuntu 17.04 on Windowns 7 machine, but I get errors when I
> try to run some of the examples in gnuradio-grc-examples. For, example,
> if I try to load wfm-rx.grc into gnu-radio
Hi Marcus,
As said earlier there is no true clock as such. We need to rely on CPU clock
and measure the deviation. The reference clock is the transmitter time duration
between two symbols which is a preset value. Do you have any suggestions for a
*better reference clock*
-ben
All:
I've got a working signal generator in GRC that uses the FFT Filter
block. In the Taps
field of this block, I've hand-entered a length-31 sequence that is an
MLSR sequence.
These sequences can be generated using the GRC block GLFRS Source as
well.
What I would like to do is call GLFSR from w
I finally got gnuradio and other stuff, like gr-iio and gr-radar
installed in Ubuntu 17.04 on Windowns 7 machine, but I get errors when I
try to run some of the examples in gnuradio-grc-examples. For, example,
if I try to load wfm-rx.grc into gnu-radio companion, I get the
following errors:
I k
In GRC I'm trying to collect outputs of an FFT ( a vector length N ) into a
matrix of size NxM. Once the matrix is filled I'd like to do some processing.
Is there a simple way I'm not seeing to do this with off the shelf blocks? Or
will this require custom code?
Thanks,
Shane
__
Hi Benny,
you're, again, missing the core problem: it's hard to measure the time
deviation between two symbols without a better reference clock. And you
don't have that. And thus, we're back at the start of all our email chain.
Best regards,
Marcus
On 09/26/2017 07:26 PM, Benny Alexandar w
Hello,
Now the timing of input side is after detecting the start of symbol. Every
symbol will be timestamped and measure the time deviation between two symbols.
d = t1 - t0,
where t0 - time of arrival of symbol (n)
t1 - time of arrival of symbol (n+1)
d - time deviat
Hi ,
I build a two way modem with two limesdr boards in gnuradio , Sample
rate for rx and tx is 3 Msample but the problem is , i get 3700ms
round trip delay between two board !
I reduced blocks output buffer but it doesn’t make difference on
latency (just reduce 100ms) .
I think the problem is gr-o
To give an update, finally I found some time to manually clean my system from
old uhd remains - and how much quite outdated stuff I did find, amazing! This
did the trick, now gnuradio master builds just fine.
Thanks a lot for the hint!
Ralph.
> -Original Message-
> From: Sylvain Munau
Hi Shi - I'd recommend you find and review the paper cited in the S&C
OFDM sync block's info:
Schmidl, T.M. and Cox, D.C., "Robust frequency and timing
synchronization for OFDM", Communications, IEEE Transactions on, 1997.
I'm guessing it will describe in detail what you're looking for. Hope
this
I read the page about schmidl&cox ofdm synch. block and now I know the
frequency mod block is here to normalize the fine frequency offset.
But why the sensitivity is -2/fft_len instead of 2/fft_len? Can
somebody explain that to me?
And I still did not understand what are the delay and multiply b
Hi folks,
I have a question about the rx_ofdm example. I have read the packet
data transmission page on gnuradio.org
(https://gnuradio.org/doc/doxygen/page_packet_data.html), but did not
find the answer I wanted. The schmidl&cod ofdm synch. block outputs
the
frequency offset to a frequency modu
Yes, that's normal (unless you have gr-iqbal installed). It's not really
a reason for alarm, unless you want the extended IQ imbalance correction
capabilities that this offers. I don't even know whether LimeSDR would
profit from that at all.
So, in this case: nothing to worry about. Happy Hack
Hi ,
I have grc 3.7.12 , when i tried to built gr-osmosdr i get this
reports after cmake :
I whant use gr-osmosdr with LimeSDR board , Is that normal ?
-- Checking for module 'gnuradio-iqbalance'
-- Found gnuradio-iqbalance, version 0
-- Could NOT find GNURADIO_IQBALANCE (missing: GNURADIO_IQ
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