Re: Help with uhd_packet_tx
Hello Kyeong: Thanks a lot for the answer. It works now. Regards. Kyeong Su Shin , 6 Mar 2020 Cum, 10:53 tarihinde şunu yazdı: > Hello Ahmet: > > You probably do not have a write permission on /usr. Simply copy relevant > files to your home directory and try again. > > It's just a Unix security policy thing. > > Regards, > Kyeong Su Shin > -- > *보낸 사람:* Ahmet DEMIR 대신 Discuss-gnuradio > > *보낸 날짜:* 2020년 3월 6일 금요일 오후 4:45 > *받는 사람:* Müller, Marcus (CEL) > *참조:* discuss-gnuradio@gnu.org > *제목:* Re: Help with uhd_packet_tx > > Thank you for the answer but gnuradio does not let me save the generated > file in the same folder when I click Run/Generate. Error is: > Error: Cannot save: /usr/share/gnuradio/examples/blocks/packet_tx.grc > > Müller, Marcus (CEL) , 5 Mar 2020 Per, 15:02 tarihinde > şunu yazdı: > > You'll need to open the packet_tx example from the same folder, and hit > "generate" on that, and then reload the block library. > > > On Thu, 2020-03-05 at 13:56 +0300, Ahmet DEMIR wrote: > > Thanks a lot for the help. I am using linux ubuntu 18.04 operating > system. When I want to use the uhd_packet_tx.grc example given in > Gnuradio/examples/digital/packet folder, I see that a block is missing as > can be seen at below figure(Example is taken from Gnuradio3.8 version). > What is this block for? Do I have an uninstalled package? I am beginner in > this area. If you help me, I am very pleased to you. > >
Measure bit error rate.
Hello Everyone, Again I have a question for another issue. In my project work, the baseband complex signal generation and later on convert it to RF signal is the main idea. These task is completed and I can successfully demodulate the RF signal from the spectrum analyzer. However, the signal generation was from a 'random signal' source and I need to measure the BER. How can I do it? I read some documents and it is mostly saying need a file sink, but what would be the file formate of the sink? I hope I will get some response. Thank you in advance. -- Sincerely, Md Atiqur Rahman
BladeRF 2 in GRC3.8
Hello everyone, at the moment, I'm trying to connect a BladeRF2 to GNU Radio Companion, using the Osmocom block (in Ubuntu). This appears to be more difficult than I thought: I could do it in GRC3.7, but for some reason I can't pull it off in GRC3.8. After a bit of Googling, I get the impression that others have struggled with this before, but I couldn't really find a solution. Does anyone know if it is still possible to connect a BladeRF2 via Osmocom to GRC3.8? Or do I have to find another solution? Thanks for your help! Jerom Maas
Re: BladeRF 2 in GRC3.8
Haven't tried it, but I don't see why not. Make sure you've got the right bladerf library development headers installed before building gr- osmosdr. Best regards, Marcus On Fri, 2020-03-06 at 11:37 +, Jerom Maas - LR wrote: > Hello everyone, > > at the moment, I'm trying to connect a BladeRF2 to GNU Radio Companion, using > the Osmocom block (in Ubuntu). > This appears to be more difficult than I thought: I could do it in GRC3.7, > but for some reason I can't pull it off in GRC3.8. > > After a bit of Googling, I get the impression that others have struggled with > this before, but I couldn't really find a solution. > Does anyone know if it is still possible to connect a BladeRF2 via Osmocom to > GRC3.8? Or do I have to find another solution? > > Thanks for your help! > > Jerom Maas smime.p7s Description: S/MIME cryptographic signature
Re: Measure bit error rate.
On Fri, 2020-03-06 at 12:00 +0100, Md. Atiqur Rahman wrote: > I read some documents and it is mostly saying need a file sink, but what > would be the file formate of the sink? > https://wiki.gnuradio.org/index.php/FAQ#What_is_the_file_format_of_a_file_sink.3F_How_can_I_read_files_produced_by_a_file_sink.3F smime.p7s Description: S/MIME cryptographic signature
Re: Weird behaviour of the analog signal source
Hi Lukas, On 03/03/2020 16:52, Lukas Haase wrote: 3.) What would you do if you would want to create precise timing signals? Is a custom block really the only way? And then, how would you implement it? This is a problem that I've run into as well in the past. You don't have to create a custom block to work around it. You can simply create a vector with your samples, and play that back on repeat. Use the 'Vector Source' instead of the Signal Source. Create an 'Import' block, with contents for the import field: import numpy as np Create a 'Variable' block, with Id 'Sine', and Value: np.sin(np.linrange(0, 2*np.pi, samp_rate, endpoint=False) Create a 'Vector Source' block, set 'Sine' as the Vector, Repeat = Yes, Output Type = Float, Vector Length = 1. Include the 'Throttle' and other blocks as before. This gives you a 1 Hz sine wave of unity amplitude. Of course this only works if your frequency fits an integral number of times within your sample rate. Then again, you can choose a different length than samp_rate as well. Regards, Paul Boven.
Re: Weird behaviour of the analog signal source
Hi again, Apologies, this is what you get from not using copy/paste... On 06/03/2020 14:06, Paul Boven wrote: Create a 'Variable' block, with Id 'Sine', and Value: np.sin(np.linrange(0, 2*np.pi, samp_rate, endpoint=False) This needs to be 'linspace', not 'linrange'. Regards, Paul Boven.
Re: Measure bit error rate.
On 3/6/20 6:00 AM, Md. Atiqur Rahman wrote: Hello Everyone, Again I have a question for another issue. In my project work, the baseband complex signal generation and later on convert it to RF signal is the main idea. These task is completed and I can successfully demodulate the RF signal from the spectrum analyzer. However, the signal generation was from a 'random signal' source and I need to measure the BER. How can I do it? I read some documents and it is mostly saying need a file sink, but what would be the file formate of the sink? I hope I will get some response. Thank you in advance. The typical way to measure BER is to use a repeating pseudo-random data sequence of some known fixed length for the transmitted data. The receiver needs to try and do a correlation between this repeatable sequence and the received bits, sliding the comparison offset one bit at a time until the maximum correlation is found. Then, you can count the number of wrong bits vs the total bits in the sequence to get a BER figure. Note; when using phase modulation, you may need to use two (BPSK) or four (QPSK) possible symbol-to-bit decodings for each comparison in order to find the right rotation of the phase constellation. As a side note, this is essentially the same algorithm that is used to acquire a spread-spectrum signal. @(^.^)@ Ed
Re: Thesis report.
Dear Marcus, Please please please help me. Please detete this from directory. This is my thesis please On Fri, Mar 6, 2020 at 9:11 PM Md. Atiqur Rahman wrote: > Hello, Please don't share it with others. > > -- > Sincerely, > Md Atiqur Rahman > Hochschule Bremen > -- Sincerely, Md Atiqur Rahman Hochschule Bremen
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