[Discuss-gnuradio] Generate Zadoff sequence
Hi, I would like to transmit and receive Zadoff chu seq from USRP and correlate this two signals. Any suggestions how we can do this? Regards ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] PSK modulation and demodulation from gnu radio tutorial.
Hello Guys, I am very much new in gnu radio and trying to do the tutorial that gnuradio published for PSK demodulation. I am using constellation modulator to modulate the signal and demodulate it by PSK demodulation block(not my QPSK demodulator). I did put every parameter as they suggested. Unfortunately, I do not get the same result(synchronized input and output ). I think its may the Channel model or time recovary block is not set correctly. Moreover, I do not understand why they use the channel model taps parameter to [1.0, 0.25-0.25j, 0.50 + 0.10j, -0.3 + 0.2j]? How did the get that? I did already spend a lot of time for searching about these but do not get any specific understandable solution. I attach my .grc file in this mail. Please have a look. Looking forward to hearing from you guys. Sincerely, Atiq stage6.grc Description: application/gnuradio-grc ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Generate Zadoff sequence
Hi Sneha Vasan - That all sounds very interesting and so forth. I'd recommend for the best chances of getting a reply from anyone regarding your specific topic, that you include links to describe the work you're referencing for the "Zadoff chu seq", whatever that is. Maybe there are some folks on the list who know what this is without referring to literature, but for the rest of us it's at least a few steps to do an internet search & parse through the results & then download a paper to help you here ... fewer steps will increase the chances of anyone here helping! Hope this is useful! - MLD ps> Please "reply all" so that the whole list can see your links & possibly help. More eyes reading your query increases the chances of someone helping! On Fri, Jun 28, 2019, at 5:58 AM, Sneha vasan wrote: > Hi, > > I would like to transmit and receive Zadoff chu seq from USRP and correlate > this two signals. > > Any suggestions how we can do this? > > Regards > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] PSK modulation and demodulation from gnu radio tutorial.
Hello Atiqur, The "PSK Demod" that you added into your flowgraph is deprecated, and is no longer supported. It is kept there for the backward-compatibility, but it is not guaranteed to work and will be removed in future. Also, that block does the synchronization and the equalization by itself, so you must remove the preceeding synchronization and equalization blocks if you actually want to use that (you shouldn't, though). Try other blocks, like a Constellation Decoder or a custom Python block. Channel Model is used to "degrade" the signal (for simulation purposes). It will apply a FIR filter to the incoming signals to simulate the multipath environment. The taps are the filter taps used for that purpose. It is just a sequence of a few random non-zero numbers to simulate the multipath effect, and shouldn't really affect the functionality of the synchronizer and the equalizer blocks. A good equalizer will cancel out the effect of those channel taps. Regards, Kyeong Su Shin 보낸 사람: Md. Atiqur Rahman 대신 Discuss-gnuradio 보낸 날짜: 2019년 6월 28일 금요일 오후 9:32:46 받는 사람: discuss-gnuradio@gnu.org 제목: [Discuss-gnuradio] PSK modulation and demodulation from gnu radio tutorial. Hello Guys, I am very much new in gnu radio and trying to do the tutorial that gnuradio published for PSK demodulation. I am using constellation modulator to modulate the signal and demodulate it by PSK demodulation block(not my QPSK demodulator). I did put every parameter as they suggested. Unfortunately, I do not get the same result(synchronized input and output ). I think its may the Channel model or time recovary block is not set correctly. Moreover, I do not understand why they use the channel model taps parameter to [1.0, 0.25-0.25j, 0.50 + 0.10j, -0.3 + 0.2j]? How did the get that? I did already spend a lot of time for searching about these but do not get any specific understandable solution. I attach my .grc file in this mail. Please have a look. Looking forward to hearing from you guys. Sincerely, Atiq ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] gr-ettus and GNU radio v3.8
Have there been any efforts yet to port gr-ettus to the gnuradio master branch? I made some trials today with gr-ettus under gnuradio-master and at least was able to compile and install it (except for fosphor which seems to need Qt4). Automatic conversion of the grc xml files to the yml format was not possible, so I converted one by hand (uhd_rfnoc_dma_fifo). I got so far that the block shows up in grc and most error messages went away. There are still errors, however, about 'Domain key "rfnoc" is not registered' for the input and output ports. This is probably the reason as well why I cannot connect anything to this block (red arrows). Any ideas? How do I register the rfnoc domain? Are there any serious reasons preventing the rfnoc blocks from working under v3.8? Best regards, Erik ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Clarification on how timing/latency applies to a stream mux
I have an application where I am multiplexing signals, and one of those signals requires time to poll a piece of equipment over a serial connection and package that information into what is sent. I have an OOT module that contains the process to make the serial connection, and then in the work function it sends/receives the various commands and packages the information into an output stream. The various signals are combined using the stream mux block. Ideally the serial block would provide this input immediately before its turn in the stream mux block, i.e, I do not want it to run ahead and grab a large number of samples, such that there is latency between its requests over serial and when they are transmitted via the stream mux block. Assume I do a good job and the serial block makes exactly the number of samples that are needed by the stream mux block for its turn. I am curious how the timing of this is handled within gnuradio. My understanding is that the work function of the serial block will provide samples per the backpressure from the stream mux block, but I do not know how exactly that should work out in this case. Is it: 1) If there is no forcing function to get the information from the serial port at a desired time, will the stream mux block start its work function when the samples run out from the block ahead of it in the stream mux? In this case I think the finite time it takes to do the serial communication would cause underruns. OR 2) Will the serial block run immediately upon the exhaustion of its output buffer, i.e., when its turn is complete in the stream mux block, then stop once it has the right number of samples for the next turn? This would be a nearly maximum latency condition, but acceptable, since it would be deterministic. If it is 2), if I put in an artificial delay inside of the serial block's work function, I could lower the latency by pushing the start of the serial communication later within the time window before the serial block's turn in the stream mux block. This would have to be done carefully, because I could accidently push things into an underrun condition if that added delay is too long. Comments? Thank you, DL ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Errors With GRC using Eventstream
Folks,
I am aware that the following is more likely an "EventStream" issue rather than
a "GNUradio" issue, but I simply do not know to whom else to turn...
I have tried multiple times in multiple ways to build GNUradio with
Eventstream. I downloaded the Eventstream code from GitHub. The build process
works fine (cmake ../; make; make install). When I run GNUradio-Companion on a
flowgraph that includes EventrStream blocks, the blocks display properly, and I
get no errors when I click on the "Generate" button, but when I click on the
"Execute" button, I get the attached error messages in the status window
(copied below).
Please let me know what I should try/do to get this to work..
Thanks in advance,
Aaron Chesir
cut here _
Executing: /usr/bin/python2 -u
/home/xroot/Sunbaked/gr-phantom4/apps/lb_modem_WISP_rough_AMC.py
Traceback (most recent call last):
File "/home/xroot/Sunbaked/gr-phantom4/apps/lb_modem_WISP_rough_AMC.py", line
36, in
import es
File "/usr/local/lib64/python2.7/site-packages/es/__init__.py", line 42, in
from es_swig import *
File "/usr/local/lib64/python2.7/site-packages/es/es_swig.py", line 17, in
_es_swig = swig_import_helper()
File "/usr/local/lib64/python2.7/site-packages/es/es_swig.py", line 16, in
swig_import_helper
return importlib.import_module('_es_swig')
File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
ImportError: No module named _es_swig
>>> Done (return code 1)
cut here _
Aaron Chesir
The MITRE Corporation
200 Valley Road
Mount Arlington, NJ 07856
w: (973) 810-0612 *NEW*
c: (908) 380-5798
ache...@mitre.org
"Ignorance is Bliss, but Knowledge is Power"
Generating: '/home/xroot/Sunbaked/gr-phantom4/apps/lb_modem_WISP_rough_AMC.py'
Executing: /usr/bin/python2 -u
/home/xroot/Sunbaked/gr-phantom4/apps/lb_modem_WISP_rough_AMC.py
Traceback (most recent call last):
File "/home/xroot/Sunbaked/gr-phantom4/apps/lb_modem_WISP_rough_AMC.py", line
36, in
import es
File "/usr/local/lib64/python2.7/site-packages/es/__init__.py", line 42, in
from es_swig import *
File "/usr/local/lib64/python2.7/site-packages/es/es_swig.py", line 17, in
_es_swig = swig_import_helper()
File "/usr/local/lib64/python2.7/site-packages/es/es_swig.py", line 16, in
swig_import_helper
return importlib.import_module('_es_swig')
File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
ImportError: No module named _es_swig
>>> Done (return code 1)___
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