I'm not very clear with your method3. But what we use is very similar
with this method. When we want to jump out from the callback's block
status, we send a useless pkt to it to make it quit out.
Lin
2010/4/20 Sung Jeen Jang :
> Hello all
> At first, I appreciate you read my text.
> My problem is
I need to import complex filter taps from a .txt file and use them in FFT
FIlter block in GRC. How can I do that?
Regards,
Umair Naeem
MSc Communication Engineering
Chalmers University ot Technology, Sweden.
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OK,
abbasi wrote:
>
> Hi Sriram ,
>
> Did you managed to solve your problem?
> I'm doing the same, but i don't have any errors. The connecting process is
> ok,
>
> but i think there is a conflict between the "call_back" of the receiving
> path and the "eval" function of the sensing path?
dump,
It was another problem
abbasi wrote:
>
> Hi,
>
> Is it not possible to have two call back functions from C++ part to
> python.
>
> for example:
> 1. The call back "eval" from the "gr.bin_statistics_f" block 'sink'
> and
> 2. The call back from the receive path in tunnel.py class
>
My walkthrough:
1) matlab, e.g. A=[3+4i 4+3i 5+2.3i 6 3.4i]
2) copy A to clipboard: clipboard('copy', A)
3) with xclip and sed, the clipboard's content is converted to
something python understands: xclip -o -selection c | sed -r -e
's/^\[//' -e 's/\]$//' -e 's/ /,/g' -e 's/i\*([^,]*),/\1j,/g' -e
's
Hi All,
When you use an USRP2 for capturing and you call
u2->stop_rx_streaming()
and later
u2->start_rx_streaming(0)
You always get a single overrun.
-a single 'S' is output on the console
-u2->rx_overruns() returns 1 (in stead of 0)
I am developing a usrp2 application which does not permit
Hello
Just checking before: does anybody have a CIC filter implementation for GR?
Thanks in advance.
Alberto
Presentaci un amico! Invita i tuoi amici a scoprire i servizi Tiscali: per ogni
amico che attiverà un servizio Tiscali, potrai avere 30 euro di sconto e lo
stesso sconto di 30 euro ver
I've recently been working on transmitting data from a vector source via
DQPSK.
I've created a Simulation [non USRP] with the following flow graph:
TX
Vector Source [0x6c] ie 01 10 11 00 > Packed To Unpacked > Mapper
[Binary 2 Gray] > Differential Encoder >
Chunks to Symbols
RX
Hi, *
I am reading through the firmware C codes and trying to figure out how to
carry the RSSI values from auxiliary ADC in the word0 section of each
ethernet frame. I was confused by the structure of the firmware C codes. In
the main() of txrx.c, there is no explicit function calls looks like sen
On Wed, Apr 21, 2010 at 04:08, Martin DvH wrote:
> This single line patch fixes this.
This has been applied on the master branch.
Johnathan
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you can call numpy.fromfile in grc
http://docs.scipy.org/doc/numpy/reference/generated/numpy.fromfile.html
if it cant find the numpy module, add an import block that has "import
numpy"
-Josh
On 04/21/2010 02:09 AM, Umair Naeem wrote:
I need to import complex filter taps from a .txt file and
Forget to mention, we are using GR 3.2.2, not the newer one with UDP
supported.
Cheers,
Hanwen
2010/4/21 hanwen
> Hi, *
>
> I am reading through the firmware C codes and trying to figure out how to
> carry the RSSI values from auxiliary ADC in the word0 section of each
> ethernet frame. I was c
Hi,
Is there any documentation or source code available for signal processing done
in the USRP2 FPGA? I have seen lots of block diagrams, etc. for USRP but been
unable to find anythign similar for usrp 1.
Thanks,
Dave
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On Wed, Apr 21, 2010 at 11:42 AM, David Barton wrote:
> Hi,
>
> Is there any documentation or source code available for signal processing
> done in the USRP2 FPGA? I have seen lots of block diagrams, etc. for USRP
> but been unable to find anythign similar for usrp 1.
Source code is found on Matt
Hi,
I am having trouble the the DBPSK mod and demod blocks. My flow graph is:
file source -> DBPSKmod -> DBPSKdemod -> file sink
The file source is a 2 byte text file set to not repeat
The default parameters were used for the DBPSKmod and demod blocks (including 2
Samples/Symbol)
When I run the
Hello,
I am using USRP with FLEX900 daughter board, i want to ask you that while
transmission what kind of *modulation technique*, used by USRP for
transmitting data.
Thanks
Ali
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On Wed, Apr 21, 2010 at 2:34 PM, Muhammad Ali Khan wrote:
> Hello,
> I am using USRP with FLEX900 daughter board, i want to ask you that while
> transmission what kind of modulation technique, used by USRP for
> transmitting data.
Which modulation technique would be an acceptable answer?
> Thank
Dear all,
I searched the email achieve and Internet, only usrp FPGA control information
can be found.
http://gnuradio.org/redmine/wiki/1/UsrpFAQFpgaRegs
u = usrp.source_c()
u._write_fpga_reg(regno, val)
set_register(FR_ADC_OFFSET_0, 0);
Nothing related to usrp2 was reported.
If I want to w
Hi all,
I installed GNU Radio via the Ubuntu package first, and when trying to run
usrp2_probe, i got the error "ImportError: cannot import name usrp2" ... so
then I tried a manual install from the latest git, and I still get that same
error.
I have confirmed that gnuradio exists in:
/usr/local/l
**NOTE** I do not get the import error when I do not run the command with
> sudo, but then I do not get the proper raw socket permissions. Maybe that
> rings a bell to someone? Something probably about an environment variable I
> am missing.
>
>
actually... I am getting the same error now without
>>> Tom Rondeau 04/20/10 9:58 AM >>>
On Mon, Apr 19, 2010 at 8:12 PM, Stephen Branch wrote:
> Hello everyone,
>
> I am part of Auburn University's Software Defined Radio Senior Design team,
>
> Software being used:
> Ubuntu v.9.10 on xfs partition
> GNURadio v.3.3 (git)
> Xine
>
> Available hardw
its probably an issue of PYTHONPATH, make sure that the import works on
command line: python -c "from gnuradio import usrp2"
You should not need to run as root as long as the socket opener app has
suid permissions
sudo chown root:usrp `which usrp2_socket_opener`
sudo chmod 04750 `which usrp2_
On Wed, Apr 21, 2010 at 3:48 PM, Stephen Branch wrote:
> Hi Tom,
>
> Thanks for the response.
>
> Just for clarification:
>
> You said:
>
> "For the channel you're looking at (20), the carrier would be at 507.31
> MHz. There's a PLL to lock to the carrier, but I'm not sure if it's
> broad enough t
thanks Josh! I seem to have had a conflicting install in /usr/lib/ rather
than /usr/local/lib, so i blasted it and updated PYTHONPATH and all is great
again ;)
- George
On Wed, Apr 21, 2010 at 4:14 PM, Josh Blum wrote:
> its probably an issue of PYTHONPATH, make sure that the import works on
>
Dear all,
I'm modifying the gr-sounder project to transmit a 113-bit legendre sequence of
the bandwith 32kHz and upconvert to certain frequency in the range 1MHz to
20MHz. At receiver side, the received signal is downconverted to baseband and
store the recovered sequence into a data file.
I
Ok, so I have an input audio chunk, from DC-48KHz, sampled at 96KHz.
I want to extract 20KHz to 32KHz, and shift this down to DC (DC-12KHz).
I think I need the freq_xlating_fir_filter_ccc() block, but I've seen
conflicting
information about how to use this block.
In GRC, what parameters do I
You can't connect the file source directly to the Modulator. If you are Using
DBPSK, the modulator will be looking for 1 bit at a time, or in this case a
byte with only 1 significant bit.
Use
File Source > packed to unpacked [1 bit per chunk] MSB first > DBPSK
Modulator
Marcin
David Barton-4
Any technique you like:
Analog: AM/FM
Digital: DBPSK DQPSK GMSK QAM
etc
Marcin
Muhammad Ali Khan wrote:
>
> Hello,
>
> I am using USRP with FLEX900 daughter board, i want to ask you that while
> transmission what kind of *modulation technique*, used by USRP for
> transmitting data.
>
> Tha
My mistake, i didn't realise you were using the available DBPSK block. The
Packed to Unpacked block is already part of this Modulator, so disregard my
comment.
Marcin
marcin_w wrote:
>
> You can't connect the file source directly to the Modulator. If you are
> Using DBPSK, the modulator will b
On Tue, Apr 20, 2010 at 10:09:03AM +, Umair Naeem wrote:
> I have made a flow graph in GRC and I am getting this error
>
> Generating: "/home/salsa/top_block.py"
>
> Executing: "/home/salsa/top_block.py"
>
> >>> gr_fir_ccf: using SSE
> gr_vmcircbuf_sysv_shm: shmget (1): Invalid argument
> gr
On Tue, Apr 20, 2010 at 02:57:04PM +0200, Joachim Roop wrote:
> Hi,
> I am trying to write to a linux pipe/fifo, but sadly this seems to freeze
> python. I am using Ubuntu 10.04 and gnuradio 3.2.2.dfsg-1ubuntu1.
> Please try to execute the code and tell me why this makes the app pause.
$ man 3 m
On 04/21/2010 11:26 PM, Eric Blossom wrote:
> On Tue, Apr 20, 2010 at 02:57:04PM +0200, Joachim Roop wrote:
>
>> Hi,
>> I am trying to write to a linux pipe/fifo, but sadly this seems to freeze
>> python. I am using Ubuntu 10.04 and gnuradio 3.2.2.dfsg-1ubuntu1.
>> Please try to execute the cod
On Wed, Apr 21, 2010 at 11:30:32PM -0400, Marcus D. Leech wrote:
> On 04/21/2010 11:26 PM, Eric Blossom wrote:
> > On Tue, Apr 20, 2010 at 02:57:04PM +0200, Joachim Roop wrote:
> >
> >> Hi,
> >> I am trying to write to a linux pipe/fifo, but sadly this seems to freeze
> >> python. I am using Ub
Well, after a little bit of mucking about, I was able to down-shift the
segment I needed into a range that
is audible to the human ear. Here's a snippet:
http://www.sbrac.org/files/vlf.mp3
(I have it in FLAC and OGG and WAV as well, just figured most folks
would have a MP3 player :-) ).
It's
On 04/20/2010 08:28 PM, Kyle Zhou wrote:
>
>
> Matt Ettus wrote:
>> On 04/20/2010 02:51 AM, Kyle Zhou wrote:
>>> Hi
>>> I use WBX + USRP1 to capture a DAB+ digital radio broadcast signal at
>>> frequency 204.64MHz and bandwidth 1.4MHz.
>>> Sampling rate is 2Msps (decimation=32)
>>> The
On 04/08/2010 06:11 PM, Shivaramaiah, Nagaraj wrote:
1) Has this configurable bit-width revision been merged? I could not
see the rx_buffer.v modifications in 3.2.2 nor any modifications towards
this feature on the host side.
2) Is there any branch doing the required modifications on the host
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