Hi all,
My colleagues and I have created a GRC & C++ application that will send a
real-time video stream over an X310+UBX-160. The physical layer is done in GRC
and is a basic QPSK modem. The problem that we are running into is flow
control. Anytime there is an underflow, it completely shuts
Hi all,
I am trying to build a custom FPGA image for my X310 (daughterboards=UBX-160)
using the uhd_image_builder gui and trying to use the following blocks:
fft
schmidl_cox
eq
ofdm_constellation_demapper
as the code is running and building, it always stops on this error:
'
[00:22:41]
Hello all,
I am trying to use RFNoC on my X310. I started with a clean install of Ubuntu
16.04 and I followed the instructions here:
https://kb.ettus.com/Getting_Started_with_RFNoC_Development
However when I get to the command of "uhd_images_downloader", it doesn't
download any RFNOC images
Hello all,
I am trying to connect my PC (intel core i7, 500gb HDD Ubuntu 18.04) with the
X310 via PCIe. I have successfully installed UHD version 3.14 and am using gcc
7.3 and I made sure my kernel was 64 bit (I ran uname -m and it returned
x86_64).
For some reason I can't get nikal to
Hi all,
So I recently posted about trying to figure out how to specify which channels I
want. My goal is use all 4 channels of the N310 simultaneously. I used the
subdev specification "A:0 B:0 C:0 D:0" in the Mb0 subdev spec input on the UHD
sink block. None of the tx leds light up and I get a
on
Hi Sarah,
For four channels on the N310 and UHD 3.11.0.1, the subdev spec will be "A:0
B:0 C:0 D:0".
What sample rate are you running at ?
Regards,
Nate Temple
On Mon, Apr 23, 2018 at 6:50 PM, Sarah Tran via USRP-users
<usrp-users@lists.ettus.com<mailto:usrp-users@lists.ett
Hi all,
I recently got the N310, and I got one of the example programs from gr-digital
to run on it. However because I didn’t specify a subdevice, it only uses one
channel. I want to be able to TX on all 4 channels but I couldn’t get the right
subdevice specification syntax correct. I tried
Hi Michael,
I just wanted to update you all on this problem. I spoke to Yang that posted
the problem in here
http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2017-March/023924.html.
Her issue was that her USRP image was not the same as her version of uhd. I
checked, and I updated
Hi Michael,
Here is the public repo with the custom block source code:
https://st...@code.oceanit.com/stran/gr-per.git . The block is called Ansect
Per ('Ansect' is the name of my own project I am using it for and 'per' stands
for packet error rate). The source code is under
Hi Michael,
I was able to make a PER block and it turns out I was dropping some packets, so
when I took into account those dropped packets when I performed the BER, I was
in a much better place 10e-2. Thank you for the explanation and help!
I had another question. I was previously using the
re the ones that
come to mind. Hope this helps! - MLD
On Tue, Mar 6, 2018, at 3:53 PM, Sarah Tran via USRP-users wrote:
I am trying to use the ofdm_tx.grc and ofdm_rx.grc to transmit data from one
N210 controlled by a host to another N210 controlled by a separate host.
Eventually I want to
Hi all,
I am trying to use the ofdm_tx.grc and ofdm_rx.grc to transmit data from one
N210 controlled by a host to another N210 controlled by a separate host.
Eventually I want to build an 8x8 MIMO system using OFDMA. I want to verify
that the correct data is being received so I sent all of the
Hi Martin,
Thank you for verifying my code I was able to put in debugging printf
statements, and was able to figure out what was wrong (although I couldn't get
the GR logging statements like debug to show). The message was indeed getting
to the UHD sink, but I realized that I needed to also
Hi All,
I would like to change the center freq of my UHD Sink depending on who the
receiver is. So I wrote a custom block that will read what the destination mac
address is for a packet, and send a message to change the center freq based on
what destination address it is. This is the format
Hi everyone!
I was wondering if anyone knew if it was possible to phase align more than 2
X310s (with UBX daughterboard) to form a coherent array? I know that 2x2 MIMO
is possible using a single X310, but I want to be able to sync 4 of them. I
thought I read somewhere that it was dependent on
Hi everyone!
I am trying to use the example tunnel.py in
~/gnuradio/gr-digital/examples/ofdm. I have two N210's connected to two
separate Linux computers, and I am using the following settings:
Machine A (TX):
sudo ./tunnel.py --freq 5e9 --verbose
opened another terminal
sudo ifconfig gr0
Hello!
I am trying to use 2 N210's connected by a MIMO cable to execute the uhd
example program txrx_loopback_to_file. I have one host machine and would like
one SDR to transmit the signal and the other SDR to receive it to a file. I
would like to eventually modify the code so that I can
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