Hi,
Is it true that most of the application and examples for mimo based usrp2,
which are created till now are only using c++ not using python??
if there are some mimo usrp2 examples using python, can anybody point me to
it?
regards,
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Hi,
Is there any files for using two usrp2 as a receivers not as transmitters?
thanks
sri ram-2 wrote:
>
> Hi all,
> I am trying to create a two transmitter setup with two USRP2s
> connected
> with the MIMO cable. I use the trunk version of GNURadio (Friday, Jan
> 29,2010) on laptops runn
Hi all,
I have problem using two daughter boards one as transceiver and the other
for sensing.
The process is ok, decimation rate is 256, freq: 2.4 - 2.5 GHz
but there is a shift in the sensed frequencies.
I read 'FSK with RFX2400' it explained about it, however when i use only one
board for sen
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
&g
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
> p
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? have you faced some
problem like this?
if
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 "phy_rx_callback"
I think they are both contradicting each other. so if
Hi all,
According to the tutorial of Gnu radio / python applications, It is possible
to create Hierarchical blocks. However when i try to implement it i get some
errors. is it possible to trace the flow graph while its is running to check
where the error is ? how? / OR is my using of connect meth
Hi all
Any body has an idea about how to change the function of gr_bin_statistics_f
:
- FROM: doing the maximization of a time vector (dwell time) for each FFT
bins (FFT vector)
- TO: doing the maximization of a time vector (dwell time) for each FFT bins
(FFT vector)
regards,
--
View this mess
Hi
Have you solved your problem? because I'm facing the same problem.
I think in your code there are two mistakes:
1. the mux value should be set to 00230001 not 10321032.
2. may be you are missing :
self._rx_subdev = self._u.db(0) + self._u.db(1)
Anyway, I'm not sure. but because when i do :
us
Hi
After reading:
1. usrp_wfm_rcv2_nogui.py
2. multi_file.py
I found a way to solve my problem but its difficult to implement.
I want to use one daughter board for only receiving, it has almost the same
as sensing signal processing blocks (as in usrp_spectrum_sense, already
implemented).
As for
Hi all,
I'm trying to combine both sensing program (usrp_spectrum_sense.py) and
transmitting program, the initialization is done using the classes
usrp_options, generic_usrp, usrp_receive_path, receive_path
But when i try to pass the usrp_source_c object to spectrum sensing program
to set its
I got the same error when i was installing gnuradio by compilation.
maybe you should try to use the binary and source packages instead.
regards,
sanam singh wrote:
>
>
> hi,
> thanks for your reply.
> i have done both and here is the output of ./configure:
>
> The following components were s
Hi,
I'm facing a problem while installing gnuradio.
a message show :
libgnuradio-qtgui0: Depends: libboost-thread1.37.0 (>= 1.37.0-1) which is a
virtual package.
Ofcourse not only this package depends on "libboost-thread1.37.0" there are
many which create a huge problem.
does this mean that this
Hi
Is there any type of automatic flow control scheme implemented in the usrp,
to prevent the buffer flooding.
if there is one please point me what its name.
regards,
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Sent from the GnuRadio mailing
post.
thanks for your help
Tom Rondeau wrote:
>
> On Fri, Feb 19, 2010 at 12:50 AM, abbasi
> wrote:
>>
>> Thanks a lot for your reply,
>> sorry for my bad english...
>>
>>
>> Tom Rondeau wrote:
>>>
>>>
>>> Which modulatio
Thanks a lot for your reply,
sorry for my bad english...
Tom Rondeau wrote:
>
>
> Which modulation are you using? Are you using the
> digita/benchmark_*.py files or is this OFDM. I'm not quite getting
> what you mean when you're talking about the PN code (which makes it
> sound like the OFDM c
I'm facing a problem, when the packet is lost in the channel.
I've tried to create my own program with multiple ACKs between transmitter
and receiver (both of them works as transceiver) to retransmit the lost
packets. However i faced some problems:
1. the CRC32 cannot recognize the error packets
Hi there,
As far as i know there is no library for error correction (to retransmit the
packets which has been mistakenly received -i don't mean error correction
codes-).
can anybody direct me if this work has been done before.
regards,
abbasi
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Does any body have an idea about construction of the Benchmark_tx packet.
Because when i transmit big files it takes long time to be received on the
other computer.
Furthermore, I want to create a header for my own protocol.
So any body have an idea about the GnuRadio packet's header?
regards
The problem has been resolved.
thanks a lot Eric
abbasi wrote:
>
>
> Eric Blossom wrote:
>>
>> On Tue, Jan 19, 2010 at 06:00:43AM -0800, abbasi wrote:
>> From the backtrace below, it appears that you already have the source
>> open, or you're runn
Hi there,
I've used the file gr_plot_const.py to plot the output data from using
benchmark_rx.py with the --log command.
However there are 8 files (rx_unpack, rx_symbol_mapper,
rx_slicer,rx_rrc_filter, rx_prescaler, rx_prescaler, rx_receiver, rx_diffdec
) which one is the final received data I do
hing to do with Auto T/R (i found
Auto T/R only in "usrp_transmit_path", it is not even exist in
"usrp_receive_path" )
best regards,
Eric Blossom wrote:
>
> On Tue, Jan 19, 2010 at 06:00:43AM -0800, abbasi wrote:
>>
>> Hi all,
>> Before i start telling about my
Eric Blossom wrote:
>
> On Tue, Jan 19, 2010 at 06:00:43AM -0800, abbasi wrote:
> From the backtrace below, it appears that you already have the source
> open, or you're running something else that has the source open, or
> you opened it earlier and didn't close
Hi all,
Before i start telling about my problem, i want to mention that i have
already read the post named "help: cannot send after transport endpoint
shutdown" which is very close to my problem but i could not solve it.
I'm trying to transmit from the usrp port A, and then make it receive at
th
The first question I've already found the solution, please just advice for
the second part.
abbasi wrote:
>
> Dear all,
>
> I searched the forum but there was no answer for these questions:
>
> 1. for a simple energy detector we have some equations which usually
Dear all,
I searched the forum but there was no answer for these questions:
1. for a simple energy detector we have some equations which usually use the
inverse erfc function. when making the the dicision using either
spectrum_sense.py/usrp_fft.py (which one do you recommend for accuracy -for
la
Im trying to sense the noise variance when there is no signal.
I'm consider a band from 1.2GHz to 1.25GHz.
Ofcourse the output is not the same for all frequencies sweeping parts.
However when there is no signal i get reading flactuates between 10dB to 20
dB, which, according to the spectrum anal
time", is to use the same method of estimating
the signal power (using fft), However, use it when you are sure that there
is no signal (can we consider this in Cognitive Radio systems??).
thanks
Newman, Timothy wrote:
>
> On 12/9/2009 7:49 AM, abbasi wrote:
>> HI ALL
>&g
I want the source code so i can know what is the function of this class
"gr_bin_statistics_f.cc". because in the API its not written clearly just
like "control scanning and record frequency domain statistics".
Thanks for the reply
Josef Vukovic-3 wrote:
>
> 2009/12/
Hi all.
can you please tell me where to find the source c code of the signal
processing blocks which already installed in the OS.
my OS is Ubuntu 9.10 - the Karmic Koala -
I found the source in the downloaded file gnuradio-3.2.2.tar.gz in this
directory:
/gnuradio-core/src/lib/general/gr_bin_stat
HI ALL
I'm trying to implement ENERGY DETECTOR using gnu radio.
Is there any library or modules to help. Especially when implementing energy
detection we need to estimate the awgn.
I've searched in
http://gnuradio.org/doc/doxygen/
but i cannot find any relative information.
regards,
--
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Hi all,
Actually i pasted this post before but according to the rules, since i was
not subscribed to the GNU mailing list i have to send it again.
I'm new to Python and gnuradio, so please help me.
My problem doesnot show any exception so i cannot trace it.
However, i created a program to tran
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