Re: [Discuss-gnuradio] Three different USRP2 nodes are transmitting with almost exactly 1 MHz frequency offset

Hi Ben, I am happy to hear from Nazmul that the image works. Thanks a lot for your help. Have a nice weekend ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] Unable to receive using USRP N210, XCVR2450 daughterboards running benchmark programs

When the transmitter was producing the dots, are you 100% sure that the packets were gettting transmitted in the first place? cause i used spectrum analyser and i ran uhd_fft.py, and saw that no signals were peaking up on that particular frequency. Even Tom had the same doubt when he visited my la

Re: [Discuss-gnuradio] reg problem in running gnuradio 3.5 benchmark programs

Hi I just want to list down the commands I used to run the benchmark programs. ./benchmark_tx.py -f 2.4G -r 1M --args "addr=192.168.10.2". In addition I also gave the option [-A J1] to select the antenna to transmit. But I couldnt detect any transmitted signal from that node. I also ran uhd_fft

[Discuss-gnuradio] reg problem in running gnuradio 3.5 benchmark programs

Shantharam Balasubramanian MS in Electrical and Computer Engineering Rutgers University Ph:732-543-6863 Email:shantharam...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] reg overrun problem

is overrun problem is occurring. Can anyone tell me why this error occurs and what I should do to overcome it? Thanks -- Regards Shantharam Balasubramanian MS in Electrical and Computer Engineering Rutgers University Ph:732-543-6863 Email:shantharam...

Re: [Discuss-gnuradio] problem in installing gnuradio

I have actually mentioned that error in the first mail itself. I have mentioned that it gave me the error, ImportError: cannot import name uhd ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnur

Re: [Discuss-gnuradio] problem in installing gnuradio

Hi I was installing the gnuradio in ubuntu 10.04, and the nodes have USRP2. After installing gnuradio from the website link, http://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstall I then installed the UHD from the instructions given in the http://cegt201.bradley.edu/projects/proj2011

[Discuss-gnuradio] problem in installing gnuradio

folder gr-digital/examples/narrowband, I got the error saying ImportError: cannot import name uhd I have not done this type of build process before and this is the first time I am doing it. Can anyone please help me out with this? Thank you -- Regards Shantharam Balasubramanian MS in

Re: [Discuss-gnuradio] Fwd: Introducing noise/ considerable BER

Hello Marcus, You sent the forwarded email a few months ago. The benchmark stuff doesn't, as far as I know, have FEC in it. I think Tom was referring to single-bit errors in the so-called "accesscode" at the beginning of the frame. If there are bit errors there, then the frame is necessarily dis

[Discuss-gnuradio] regarding connecting SNR block in benchmark_rx

e SNR. Thank you -- Regards Shantharam Balasubramanian MS in Electrical and Computer Engineering Rutgers University Ph:732-543-6863 Email:shantharam...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] want to use the gr_probe_mpsk_snr block in benchmark programs in python/digital folder

e of this block, or if someone can give me the syntax to add this block to my code. Your reply will be much appreciated. Thank you -- Regards Shantharam Balasubramanian MS in Electrical and Computer Engineering Rutgers University Ph:732-543-6863 Email:shanthar

Re: [Discuss-gnuradio] reg calculation of BER/SNR using gnuradio UHD

Hi When I run it in USRP1 nodes, I don't get the error as before, that says it cannot find USRP1. But the benchmark_tx program says "Failed to tune to center frequency". I then tried to send it in 2 MHZ and also in 2 GHZ frequency, but it still doesn't work. Can anyone tell me why it's happening

Re: [Discuss-gnuradio] reg calculation of BER/SNR using gnuradio UHD

Hi Thanks for the reply. And yes you are correct. It just works for USRP1 alone, though it seeks to give the option of selecting the USRP number. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gn

Re: [Discuss-gnuradio] reg calculation of BER/SNR using gnuradio UHD

srp[2]) Runtime error: can't open usrp We don't know if we are giving wrong commands because similar commands work well for benchmark programs in the python/digital sub-folder. Your help will be very appreciated. Thanks, -- Regards Shantharam Balasubramanian MS in Electrical and Compu

[Discuss-gnuradio] reg calculation of BER/SNR using gnuradio UHD

use for these programs? It will be much helpful if someone can help me out with this. Thank you -- Regards Shantharam Balasubramanian MS in Electrical and Computer Engineering Rutgers University Ph:732-543-6863 Email:shantharam...@gmail.com

Re: [Discuss-gnuradio] Help with rx_sample_to_file.cpp program and modulation scheme change in UHD

tely, I don't see the gr-digital folder there.* > > Can you tell me what image I should burn on the SD cards in order to see > this folder and the files that I can see on the website? > > Thanks, > > Shantharam > -- Regards Shantharam Balasubramanian MS in

Re: [Discuss-gnuradio] Help with rx_sample_to_file.cpp program and modulation scheme change in UHD

Hi Josh, Thanks for the email. I went through the website you mentioned and I found there were benchmark_tx.py and benchmark_rx.py files in the gr-digital folder. We imaged the nodes using gnuradio-uhd-working.ndz. Using this image, we see the following folders when we log in to the nodes: gnur

Re: [Discuss-gnuradio] Help with rx_sample_to_file.cpp program and modulation scheme change in UHD

gr-uhd component and getting familiar w/ > gnuradio-companion: > http://code.ettus.com/redmine/ettus/projects/uhd/wiki#Gnuradio-UHD > > -Josh > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lis

[Discuss-gnuradio] Help with rx_sample_to_file.cpp program and modulation scheme change in UHD

ppreciated. Thanks, -- Regards Shantharam Balasubramanian MS in Electrical and Computer Engineering Rutgers University Ph:732-543-6863 Email:shantharam...@gmail.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.o

[Discuss-gnuradio] about UHD pgms running

with: ... Error: LookupError: KeyError: No devices found for -> Empty Device Address is there something wrong in these cmds? It would be great if you can let me know the mistake I am doing. Thank you -- Regards Shantharam Balasubramanian MS in Electrical and Computer Engineering Rutg

[Discuss-gnuradio] raw binary data transmission

hi I am using USRP2 testbed and I am willing to transmit and receive binary data between two nodes I am using. I have been working with the benchmark_tx and rx.py and I have been modifying those programs for the past 2 months for my project. I did this by, generating random number between 0 and 1 a

[Discuss-gnuradio] Fwd: Introducing noise/ considerable BER

Hello Tom, Marcus and Martin, Thanks a lot for your replies. One of the objective of our experiment is find to the capacity of a path, i.e, we want to transmit a random binary sequence between two USRP nodes. We want to find the maximum data transfer rate (in bit/sec) with a "small" bit error rate

Re: [Discuss-gnuradio] Introducing noise/ considerable BER

Hello people, Thanks a lot for the reply. So, you are saying that the packet loss at low transmitter amplitude in benchmark_Tx.py and benchmark_Rx.py come from the loss of packet synchronization data, i.e., a part of the packet synchronization data gets lost or degraded due to low SNR. I know that

[Discuss-gnuradio] Introducing noise/ considerable BER

Hi I have been working in usrp2 testbed, and I have been modifying the benchmark_tx and rx programs for my project. There have been situations where I was supposed to introduce noise to find out BER. I did that by giving lower transmitter amplitude values. But very low values cause packet loss alo

[Discuss-gnuradio] regarding transmitting and receiving in two different frequencies

hi I am looking to make a transceiver work such that it receives the data and then transmits its own and other nodes data that it got. I am new to python and gnuradio and so I have been modifying the benchmark_tx and rx.py, so far to do my project, Since I have to make the receiver to work first an

[Discuss-gnuradio] reg transceiver program

hi. i wanted to simulate a transceiver which receives some data and then transmits its own and the data it got. I have been modifying then benchmark_tx and rx program to do this and I was able to simulate the transceiver I mentioned, by adding the sender code in the "def_rxcallback" function. I don

[Discuss-gnuradio] doubt req creating 2 top_blocks

hi. I am working with benchmark_tx and rx programs and I have been changing them a lot for a project I am working with now. I just want to make a node run as a receiver and then as a transmitter. I think it involves creating two top_blocks. Is it possible to create such two blocks and run one and s

Re: [Discuss-gnuradio] regarding calculating the noise power

Also I have been working in a modified program of benchmark_rx for this case. It would be more helpful if someone helps me to reduce it or to measure it, so that I will be able to explain to the people who will ask me about the spike. ___ Discuss-gnuradi

[Discuss-gnuradio] regarding calculating the noise power

Hi. I am using USRP2 testbed. I have been recently working on plotting the PSD of the received signal and I was able to do it. The graph plots the signal in baseband frequency level. Then I turned on the receiver node while keeping the sender node off. When I plotted the PSD graph for that, I was e

[Discuss-gnuradio] regarding connecting blocks

Hi I am new to python and I need to know about adding new blocks. I modified the benchmark_tx and rx.py files, so that the receiver will get the file from sender and store it in a txt file which is passed as an arguement. I also added few lines of code so that the receiver calculates the number of