Glen Langston wrote:
Comments and improvements welcomed.
Data are all obtained using Gnuradio designs available from the DSPIRA web site.
https://github.com/WVURAIL/gr-radio_astro
Tried building it on Win-10 using MSVC/clang-cl.
But it fails on the use of 'clock_gettime()', 'CLOCK_REALTIME' e
Dears,
I am doing some analysis on channel state information of OFDM signals. I used
GNURadion rx_ofdm.grc (gnuradio/gr-digital/examples/ofdm at main ·
gnuradio/gnuradio) for signal transmission and reception through a channel
model block. Then, the CSI has been extracted using Tag debug block
Hi George,
that's a multiplicative voice scrambler!
The pre-Second World war voice scrambler system "SIGSALY" [1] was kind
of similar;
just that the scrambling sequence came out of a noisy vacuum tube, not
Python's random.random(), and that the combination method was taking
samples and adding
Hi Hamed,
so, estimating anything from noise will be noisy if the estimation has
something to do with the estimated entity. (Compare, especially, the
Cramér-Rao Lower Bound: you can't bias-free estimate with zero error in
a noisy reception.) So, is it right if I assume that you measured or
ca
Hi everyone,
I am trying to record some data from an SDR and would like to sync/tag
the data with the current gps position from gpsd. I am kind of stuck and
don't know how a possible solution for that might look like in grc.
I have a python function that gets the current position as a tuple, bu
Hi Fabian,
I'd write a block that copies a stream in- to output. It might query
gpsd every time the work() function is called, or have a FIFO into which
data from gspd is being pushed by a separate thread (or by reading from
a socket or however gspd works, I must admit I'm not sure).
You th
Hi Marcus,
wow, a lot to read... I am about to do this all manually without gnuradio ;)
Thanks a lot,
Fabian
Am 03.05.23 um 20:04 schrieb Marcus Müller:
Hi Fabian,
I'd write a block that copies a stream in- to output. It might query
gpsd every time the work() function is called, or have a FIF
On 03/05/2023 14:04, Marcus Müller wrote:
Hi Fabian,
I'd write a block that copies a stream in- to output. It might query
gpsd every time the work() function is called, or have a FIFO into
which data from gspd is being pushed by a separate thread (or by
reading from a socket or however gspd
OK, I think I found an easier way (at least for me), without having to
write my own module - never done that.
I used the "Tags Strobe" block in combination with the "Python Module"
for my gps_get_position() function.
Anyway, where can I find a definition of the format of the "Tagged File
Sink"?
Sorry, forget it. Wrong sink...
Am 03.05.23 um 20:52 schrieb Fabian Schwartau:
OK, I think I found an easier way (at least for me), without having to
write my own module - never done that.
I used the "Tags Strobe" block in combination with the "Python Module"
for my gps_get_position() function.
On 03/05/2023 14:59, Fabian Schwartau wrote:
Sorry, forget it. Wrong sink...
You probably want:
https://wiki.gnuradio.org/index.php/File_Meta_Sink
Am 03.05.23 um 20:52 schrieb Fabian Schwartau:
OK, I think I found an easier way (at least for me), without having
to write my own module - never
Exactly, and there are some nice examples in the documentation :)
Thanks a lot!
Am 03.05.23 um 21:01 schrieb Marcus D. Leech:
On 03/05/2023 14:59, Fabian Schwartau wrote:
Sorry, forget it. Wrong sink...
You probably want:
https://wiki.gnuradio.org/index.php/File_Meta_Sink
Am 03.05.23 um 20:
Hey Marcus,
Quite apart from the GPSD-specific stuff, it would be useful to have a kind of "annotated
formatted data" file sink for low-rate
data (like scientific data, etc) which supports CSV outputs, and has some way of
ordering any tags that come in with the
data and formatting them app
On 03/05/2023 16:51, Marcus Müller wrote:
Do agree, but really don't like CSV, too underspecified a format, too
many ways that comes back to bite you (aside from a thousand SDR users
writing emails that their PC can't keep up with writing a few MS/s of
CSV…)
I like CSV because you can hand yo
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