If you want to load files into Matlab which you saved for example through a
file sink, you can do that via the command fread. Check the documentation of
it. For the correspondences between Matlab and GNU Radio Type, compare the
fread documentation and this site of J.Blum:
Thank you again for your answer. I looked up the Header File of gr_message
and it should have the msg() attribute. But when I tried to access, it gave
me the error that this attribute isnt existing.
Anyway, I now figured out a way which is enough for me: I converted the
returned string to a list
Thank you much for your answer. Indeed, its a shared pointer. I now figured
out, the the only way to get the data is via .to_string(). Though, im stuck
again. I use the following code to initialize the queue and message sink:
self.sink_queue = gr.msg_queue()
Im sorry that im pushing my question, but its still unsolved for me and need
it for my project..
So again, my message queue is filling, i checked that via
tb.sink_queue.count(), but if i want to transfer pop a message, it just
returns me that message_sptr thing. Can someone help me on that? I
Hello!
I have another question, this time about message queues. I have a
demodulator hooked up to message sink. But when I want to pop a message via
tb.sink_queue.delete_head(), its just returning that to me:
gnuradio.gr.gnuradio_core_runtime.gr_message_sptr; proxy of lt;Swig Object
of type
Hi!
Im using a message queue to count data, while the data is sinked to a file.
Then if the counter reaches X i want the old file to be closed and continue
sinking in a new file. Then again if reaches X to switch to the old file. So
my bottom part code looks like that:
tb = top_block()
I setted X some lines before as 1000. And the tb.sink_queue.count() is
resetted by tb.sink_queue.flush() i thought.
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I now have 2 new problems :(
1. I have a random source hooked to a Modulator and then to USRP. From the
same device i listen at the same Frequency. But since the antennas are just
a few cm's away, the constellation graph is completely diffuse and the
points are anywhere, there arent any fixed
Thank you for the advising! That looks like something what i could use.
I just came up with another question:
I simply tried to simulate a DPBSK Path with noise, loaded from a file and
sinked to a file. Between Demod and Sink i placed a Pack K Bits with K=8.
Thanks! I see now what you mean, but how can i get rid of these boundary
mistakes? The Result is similar to the original, but the bytes are kind of
shifted. So from a FF 00 results a FE 01..
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This is actually what i would like to do later by hand. Isnt there a
possibity how i can fetch the raw bits or bytes directly after receiving?
Sorry if its a stupid question..
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Hello!
As to introduct me, im very new to GnuRadio and the general topic of SDR.
However, i have a project in which i should implement a very basic way of
sending packets. This given packet format has a constant preamble and a
constant length of appended databits. For detecting those out of a
Im a total newbie to GNURadio. So my plan was to simply test a digital
modulation path, without channel. Then compare input file and output file.
The input file was a previously captured random file through GNURadio. But
the problem is, that the output file is about 8 times bigger and clearly not
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