I am trying to do sdr radar. I will send linear fm modulated signal and then
take it. I am seaching fm modulating blocks in grc. I ran some examples but
could not understand it is true or not. I also looked nbfm and wbfm transmitter
and receiver blocks in grc but i could not find any document
Hello all!
My name is Kresimir Dabcevic and am currently a masters student at Mälardalen
University in Sweden, starting my masters thesis on Software defined radio.
We are looking to do a research on power consumption of technologies that
operate in the 2.4 GHz ISM band, primarily Bluetooth a
On 02/23/2011 11:25 PM, Almohanad Fayez wrote:
I was wondering about people's experience with the UHD driver on the E100 or
the Beagleboard. I am able to use it to receive IQ data from the USRP but I
can't seem to transmit anything from it ... if I take the same flowgraph to a
laptop I'm able
schrieb Moeller am 2011-02-24 00:33:
> On 22.02.2011 15:26, Patrick Strasser wrote:
> Not exactly. The FCB is not passing the IQ to the analog sound interface.
> ADC is done within the dongle and the digital samples are transmitted via USB
> to an emulated "virtual" sound card.
>
> However, for t
On Thu, Feb 24, 2011 at 02:06:41PM +0100, Kresimir Dabcevic wrote:
>
> My name is Kresimir Dabcevic and am currently a masters student at
> M??lardalen University in Sweden, starting my masters thesis on
> Software defined radio.
Hi, Kresimir. I'm Michael Ossmann, one of the gr-bluetooth develope
On Thu, Feb 24, 2011 at 02:06:41PM +0100, Kresimir Dabcevic wrote:
>
> and I presume that it also supports working in a 4-bit mode, which
> should allow for a 100 MHz bandwidth, which should be sufficient?
Oh, and perhaps this goes without saying, but 4 bits of dynamic range is
extremely low for d
Hello
Just to make sure, may anybody please confirm the sequence of operations within
the freq_xlating_fir_filter?
Is it:
in --->XLATE--->FILTER--->DECIM---> out
When defining the FIR taps with firdes, shall I consider the input sampling
freq or the output sampling freq (= input
sampling freq
Epiq Solutions is pleased to announce that their Bitshark USRP RX
(BURX) daughterboard is now supported by the UHD. Similar to other
hardware supported by the UHD, this will provide a common PC-based
driver controlling the BURX daughterboard, and should work across the
entire suite of USRP platfor
On 02/23/2011 11:25 PM, Almohanad Fayez wrote:
I was wondering about people's experience with the UHD driver on the E100 or
the Beagleboard. I am able to use it to receive IQ data from the USRP but I
can't seem to transmit anything from it ... if I take the same flowgraph to a
laptop I'm able
If I remember correctly the audio rate is literally the data rate your
sound card is sampling at eg 32kHz or 44.1kHz and quad rate is the
incoming rf sampling rate. For example you may have sampled your RF at
128kHz and be running your audio (or whatever) at 32kHz.
On 24/02/2011 11:45 PM, öme
1- I'm using the host USB not the OTG
2- I'm using the 2.6.37 kernel with Angstrom 2010
3- The following is the dmesg output which looks ok ... at least to me :)
[ 108.369293] usb 1-2.3.1: USB disconnect, address 4
[ 108.770874] usb 1-2.3.1: new high speed USB device using ehci-omap and
address
Hi
I am using an USRP N210 with GNU radio, UHD and GRC on Ubuntu 10.10. I have
connected a WBX daughterboard to the USRP. I want to receive and, of course,
listen the radio thanks to this system. I have built a flow graph and when I
execute it, I only heard noise and can see this message in the t
gr_fir_ccc: using SSE
> aUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaU
>
These characters being printed means that you have mismatched sample
rates between your USRP device and sound card. Could this be the case?
-josh
Please accept our apologies if you receive multiple copies of this Call for
Papers (CFP).
_
IEEE GLOBECOM 2011 - Signal Processing for Communications Symposium
5-9 December, Houston, Texas, USA
Paper Submission Deadline: 1 March 2011
Authors are invited to submit original techni
Hi Josh,
Yes, I have already though about that and I tried to match the sample and
sound card rates without success (but I might made a mistake). I have also
read on the Internet that it might come from the sound card which cannot
support all rates but I did not find anything more about that subj
I have run into this problem on the Beagleboard ... here's my explanation for
what I think is happening and the fix. What's happening is GNU Radio is trying
to run as a real time thread which if you're root or you've given your Linux
username permission to have rtprio privileges but for so
Hi,
I'm using Ubuntu 10.04 with a recent gnuradio-next branch and the UHD
driver on USRP2/WBX boards.
In an outdoor setup I have two receiving nodes about 40m away from
each other and from the transmitter. The transmitter is a PC with two
USRP2s connected with a MIMO cable. It is sending two diffe
> The gain seems to be varying with around 2 Hz frequency.
Quite possible, the WBX transmit has an analog power control loop
formed by the ADL5386. The "gain" setting on WBX transmit is really
more of a setpoint for the power control loop than gain
Jason
On Thu, Feb 24, 2011 at 7:17 PM, Anoth wrote:
>
> Hi Josh,
>
> Yes, I have already though about that and I tried to match the sample and
> sound card rates without success (but I might made a mistake). I have also
> read on the Internet that it might come from the sound card which cannot
> support
> The version of GNUradio that I'm using is GNURadio 3.2svn
>
I think there was some work in 3.3 for this sort of issue, but thats
just from memory, as I mostly use UHD these days.
Things you might look for:
python -c "from grc_gnuradio import usrp as grc_usrp;
help(grc_usrp.simple_usrp.simple_si
2011/2/24 Ingmar Meins :
> If I remember correctly the audio rate is literally the data rate your sound
> card is sampling at eg 32kHz or 44.1kHz and quad rate is the incoming rf
> sampling rate. For example you may have sampled your RF at 128kHz and be
> running your audio (or whatever) at 32kHz.
On Thu, Feb 24, 2011 at 12:18 PM, Alberto Trentadue
wrote:
> Hello
>
> Just to make sure, may anybody please confirm the sequence of operations
> within the freq_xlating_fir_filter?
>
> Is it:
> in --->XLATE--->FILTER--->DECIM---> out
>
> When defining the FIR taps with firdes, shall I consider t
On Thu, Feb 24, 2011 at 16:54, Veljko Pejovic wrote:
>
> I'm using Ubuntu 10.04 with a recent gnuradio-next branch and the UHD
> driver on USRP2/WBX boards.
> In an outdoor setup I have two receiving nodes about 40m away from
> each other and from the transmitter. The transmitter is a PC with two
On Thu, Feb 24, 2011 at 12:20 AM, peng senl wrote:
> Hello,
>
> I am using a C++ interface with the USRP2 board. I found the CPU usage is
> about 30% for dual core 3.2G CPU with 5M sample frequency while about 60%
> usage for 20M sample frequency. I am just keep running the rx_sample()
> funct
Hello,
I'm interested in editing some of the source and sink .cc files.
On my older laptop I have obtained GNURadio from the terminal using the build
instructions. I am able to locate the .cc files I am interested in editing.
On my newer laptop I installed GNURadio and GRC using the synaptic p
Yes, you must be right, I must have made a mistake when I set up the flow
graph. How do you know the sample rate delivered by the UHD and how is the
Polyphase Resampler implemented into the flow graph ?
Francois
Tom Rondeau wrote:
>
> On Thu, Feb 24, 2011 at 7:17 PM, Anoth wrote:
>>
>> Hi Jos
On Thu, Feb 24, 2011 at 10:28 PM, Anoth wrote:
>
> Yes, you must be right, I must have made a mistake when I set up the flow
> graph. How do you know the sample rate delivered by the UHD and how is the
> Polyphase Resampler implemented into the flow graph ?
>
> Francois
Not entirely sure how to d
Hi List,
I'm transmitting a pure sinusoid of 50kHz using the tx_waveforms UHD
example and receiving the same using rx_samples_to_file example. I'm
using N210/WBXs for Tx and Rx at 250MHz, at 500 ksps, --ampl=1.0,
buffer size of 200 at Tx, and 0 dB for Rx,Tx gain.
I plot the received file (the I s
On 02/24/2011 09:43 PM, Phelps Williams wrote:
> I'm using grc to generate some extremely simple flowgraphs but I'm seeing
> very odd performance. Any idea why I can't seem to get this combination to
> work? I have had success with a GRC + USRP2 + WBX + UHD, anybody know why
> I'm having issues
On 02/24/2011 10:13 PM, Arya Santini wrote:
> Hi List,
>
> I'm transmitting a pure sinusoid of 50kHz using the tx_waveforms UHD
> example and receiving the same using rx_samples_to_file example. I'm
> using N210/WBXs for Tx and Rx at 250MHz, at 500 ksps, --ampl=1.0,
> buffer size of 200 at Tx, a
Hello @All,
i’m working on a project using the FTW 802.11 ofdm encoder Project from
Cgran on Ubutntu 10.04 and Gnuradio3.2.2, Python 2.6 , USRP2 RFx2400.
Transmitting single Frames works fine.
I want to send multiple packages, so i modified the send_pkt function in
the ftw.ofdm.py file and call
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