Hi EJ,
this sounds like a very interesting project. Since you asked for ideas,
I guess it would be nice to have a Schmidl&Cox style OFDM
synchronization block.
Cheers
Johannes
Am 29.04.19 um 02:00 schrieb EJ Kreinar via USRP-users:
> Hi all,
>
> I'm very happy to announce the (very modest) re
Dear all,
I'm maintaining ODR-DabMod[1], a Digital Audio Broadcasting modulator
which uses UHD to drive a USRP at 2048ksps, in most applications a B200.
ODR-DabMod runs the modulator and the UHD output in separate threads, to
ensure that a few modulated frames are always ready when the USRP needs
Chris,
It is a shame that the E320 doesn't seem to have complete support, but maybe
someone from Ettus will chime in at some point (though it has already been over
a month since you posted). As of now, these are paperweights in our office and
I have to switch gears to a different project with
Hello,
I am using two N310 USRP's to create an 8x8 MIMO setup. But, I am unable to
make both of them work together. I am using an example program from the UHD
driver - txrx_loopback_to_file.
I give the following command:
./txrx_loopback_to_file --tx-rate 7.68e6 --rx-rate 7.68e6 --tx-freq 2.60e9
Ali, I just pushed a couple of updates. Let's see if that fixes it for you.
I added:
1. [Timer] Some thread safety to the timer module. I also noticed in my
flowgraph if I went to the top block options and turned on "realtime
scheduling" it was generally more accurate on the timing (makes sense)
Hi!
I agree with Johannes that Schmidl&Cox OFDM sync would be a nice extension.
Do you plan to provide pre-built FPGA images containing Theseus Cores in the
future for certain USRP devices? I guess this would make it even easier for
first time users and would well suit the "batteries included"
USRP Forum,
I am trying to get OpenBTS working with an x310 with UBX160 daughter cards
inside. My test phone can see my network but when I try to connect the
phone fails connection. I also have a B210 that is running on the same
machine that does allow the phone to successfully connect to my fake
Setting a large number of UHD buffers can help quite a bit. In the GRC
UHD Sink block device address:
"num_send_frames=256"
In Python:
self.uhd_usrp_sink_0_0 = uhd.usrp_sink(
",".join(("num_send_frames=256", "")),
uhd.stream_args(
cpu_format="fc3
I've had similar issues on the e310 with similar sample rates. On the e310
no usb is involved. Unfortunately I have not been able to fully get rid of
the underrun issues as well.
So far I have tried:
- separate threads with ping-pong buffers: this helped
- linux real-time scheduling
- increasing t
Hi, Neharika and All,
I met some problems on controlling 2 N310s too.
But first of all, the argument "second_addr" indicates the IP addr. of
the second
SFP+ port on that device, and is set in the case of dual 10G streaming.
I think the first way you wrote is the right way to access the 2 N310s,
e
Hi Mathhias,
On Thu, May 02, 2019 at 02:18:38PM +0200, Matthias Br??ndli via USRP-users
wrote:
> On some systems, we observe sporadic underruns. They occur in irregular
> intervals, something like once a minute, sometimes rarer. Seen with both
> USB2 and USB3 hosts, over several UHD versions. Unt
GPS doesn't like to go back in time. You probably need to reset the almanac
and a reboot is doing that.
On Tue, Apr 30, 2019, 9:53 AM Jason Matusiak via USRP-users <
usrp-users@lists.ettus.com> wrote:
> I've seen this a few times, but I cannot seem to lock it down to any
> particular reason. Whi
Hello fellow N310 users. My lab has 6 N310's all operating and streaming to
a single data server (10 Gbe links).
We use GNU Radio for everything. The software is great for controlling
multiple devices with many antennas easily (highly recommended). My
experience with native C++ UHD driver commands
You are probably right. What I discovered was it is the ublox itself that is
the problem.
My solution is that at the top of my GR constructor, I disable the gpsd, send a
reset command to the ublox, and then reenable the gpsd. So far so good with
that approach.
On May 2, 2019, at 7:36 PM, Dan
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