Hello everyone,
I have posted a similar question before but didnt get too much attention
thats why I am posting this question with hopes that I will get some
response this time because I have tried to make the question simpler.
In one line the problem is I am so far unable to configure 2 RX chan
Thanks Jason,
To make the things simple I have first tried sensing with a single channel
(This code is well known and some where available on this forum or GNURadio
examples), it is working fine. In this code I simply display the maximum
value of each FFT scan. When I have some data source at the
what should I do to receive better data (of same
order as in the case of single RX channel) when I have two RX channels
Please let me know if I am doing something wrong. I am tried every
possibility!!
Best Regards
kaleem ahmad wrote:
>
> Hallo everyone,
>
> I dont get
erstanding about deinterleaver correct or do I need to do some
special processing to get these separate streams.
Thanks
Kaleem AHmad
kaleem ahmad wrote:
>
> In addition to my above mentioned question, please also comment on what
> should be the value of mux (I am setting 0x3210) and
2 RFX2400 cards and
there will be one tx stream through any one of these cards.
Best Regards
Kaleem Ahmad
kaleem ahmad wrote:
>
> Hello every one,
>
> I am using USRP1 + RFX2400.
>
> I want to use 2 RFX2400 cards. Overall I will have 2 RX streams and 1 TX
> stream from t
Hello every one,
I am using USRP1 + RFX2400.
I want to use 2 RFX2400 cards. Overall I will have 2 RX streams and 1 TX
stream from this system. Following are main parts of my RX_Path (complete
code for RX-Path is also attached, if you want please have a look on that,
TX-path is not here). I am un
Thanks Jason, I am trying this, hopefully it will solve my problem.
Best Regards
Jason Uher wrote:
>
>> usrp_dual_source want antennas which should be used as input parameters,
>> as
>> follows (I copied this line from a question posted on a thread which was
>> using LFRX daughter cards)
>>
>>
er that.
Best Regards
Josh Blum-2 wrote:
>
> There is a handy dual_usrp wrapper in grc:
> http://gnuradio.org/trac/browser/gnuradio/trunk/grc/src/grc_gnuradio/usrp/dual_usrp.py
>
> You can use it like:
> from grc_gnuradio import usrp as grc_usrp
> grc_usrp.dual_sourc
Hallo,
We use following when there is only one RFX2400 daughter card (I think there
is onle one subdev in RFX2400 cardIs it correct???).
u = usrp_source()
u.set_mux(usrp.determine_rx_mux_value(u, rx_subdev_spec))
Can some one guide me how do I change it when two RFX2400 daughtercards
Hello everyone,
I am using USRP1 + RFX2400.
You know there are two antenna ports on RFX2400 daughter card those are RX2,
TX/RX. Is it possible to use both these ports in parallel for data
reception. If yes then pelase provide me little clue how I should do it, or
may be refer me to some existing
Can someone at least comment on first part of the problem, I mean where I am
getting this 'factor' from
Thanks
kaleem ahmad wrote:
>
> Dear All,
>
> A few weeks ago I was involved in a discussion about calculating the cycle
> time of an unknown system present i
Dear All,
A few weeks ago I was involved in a discussion about calculating the cycle
time of an unknown system present in the area by sensing the spectrum with
the help of RFX2400+USRP1 system. For details you may like to have a look on
previous mails on this thread.
http://www.nabble.com/cycl
3, 167],
which dont provide me any clue. Similarly for any other cycle time I am
getting random values.
Is there any thing wrong with selection of decimation rate? can some one
help me to figure out where I am doing wrong.
Thanks and Best Regards
Firas A. wrote:
>
>
> Hi,
>
>>
Thanks Firas,
It is clear and I will implement it and will come back soon hopefully with
successfull results.
Best Regards
Firas A. wrote:
>
>
> Hi,
>
>> On Wed, 4/22/09, kaleem ahmad wrote:
>>
>> Thanks Firas,
>>
>> But I can simply tell
the
filter_coefficients???
Best Regards
Firas A. wrote:
>
>
> Hi,
>
>> On Wed, 4/22/09, kaleem ahmad wrote:
>>
>> Hi All,
>>
>> I am trying to detect the cycle (or period) time of a cyclic data
>> transmitter by sensing the channel. The tran
Hi All,
I am trying to detect the cycle (or period) time of a cyclic data
transmitter by sensing the channel. The transmitter can be any general e.g.
FSK/ZigBee/Bluetooth etc, and transmitting a fixed packet after every 'T'
ms. I am interested to detect this T using GNURadio/USRP.
The idea is t
Hi All,
As you can read previous posts on this thread and can know from that I am
trying to detect the cycle time of a cyclic data transmitter by sensing the
channel.
>From discussion on this thread I understood in the following way:
USRP RF sampling rateAfter decimation with D=256---S
time.
Best Regards
Brian Padalino wrote:
>
> On Mon, Mar 23, 2009 at 10:20 AM, kaleem ahmad
> wrote:
>>
>> Thanks for all these replies,
>>
>> The problem is my investigation about cycle time is not restricted to
>> FSK,
>> I just gave the example
wrote:
>
>
>
> kaleem ahmad wrote:
>> Thanks Ed,
>>
>> ADC sampling rate = 64MHz
>> it gives resulution time = 1/64MHz = 156 ns
>> if we choose N=512 for FFT then total observation time for one scan(one
>> complete FFT) is = 156ns x 512 = 8 micro
Thanks for all these replies,
The problem is my investigation about cycle time is not restricted to FSK,
I just gave the example of FSK system. I would like to calculate the cycle
time of any system (ZigBee, FSK, CSS etc) present in the area. My target is
to sense as much systems as possible and
Thank Brian,
Can you give some hint, what do mean ??? I mean a little idea what do you
want to say?
Best Regards
Brian Padalino wrote:
>
> On Fri, Mar 20, 2009 at 9:34 AM, kaleem ahmad
> wrote:
>>
>> Thanks Ed,
>>
>> ADC sampling rate = 64MHz
>> it g
o find two peaks in a
single array (availability of two peaks will give me the oppertunity to
calculate the time distance between them).
Thanks and Best Regards
Ed Criscuolo-2 wrote:
>
>
>
> kaleem ahmad wrote:
>>
>> 3- Can you suggest some different way to solve this pr
Hello every one,
I am using USRP1 with RFX2400 daughter card.
I have a system (any state of the art system, let say Atmel's narroband FSK
which works in 2.4 GHz band) transmitting a fixed packet cyclically (let say
cycle time = T ms).
I want to use USRP system to sense the spectrum and calcu
Hello every one,
I am using USRP1 with RFX2400 daughter card.
I have a system (any state of the art system, let say Atmel's narroband FSK
which works in 2.4 GHz band) transmitting a fixed packet cyclically (let say
cycle time = T ms).
I want to use USRP system to sense the spectrum and calculat
Hello every one,
I am using USRP1 with RFX2400 daughter card.
I have a system (any state of the art system, let say Atmel's narroband FSK
which works in 2.4 GHz band) transmitting a fixed packet cyclically (let say
cycle time = T ms).
I want to use USRP system to sense the spectrum and calculat
I
used fftsink)
Kaleem Ahmad
Johnathan Corgan-2 wrote:
>
> On Tue, Nov 4, 2008 at 10:53 AM, kaleem ahmad <[EMAIL PROTECTED]>
> wrote:
>
>> I have following message, can someone tell me how can I remove it?
>>
> [...]
>> File "/usrp/cognitive/gr-com
You can find the code attached.
Thanks
Kaleem Ahmad
Firas A. wrote:
>
>
> Hi,
>
> Post your code used in the experiments (the one you used to get input
> signal from RX2) and the command line arguments you use to run the
elf._coerce_endpoint(dst)
File "/usr/local/lib/python2.5/site-packages/gnuradio/gr/hier_block2.py",
line 65, in _coerce_endpoint
raise ValueError("unable to coerce endpoint")
ValueError: unable to coerce endpoint
Best Regards
Kaleem Ahmad
--
View this message in co
Yes I have tried both RX2 and TX/RX antennas, but I have same results.
Kaleem Ahmad
Eric Blossom wrote:
>
> On Tue, Nov 04, 2008 at 07:59:09AM -0800, kaleem ahmad wrote:
>>
>> Dear Firas,
>>
>> Thanks for your reply, First of all I am using antenna (RX2), an
with many TX and RF gains.
I am also using log function, and I have already checked with larger
tune_delays but all in vain
Any suggestions??
Best Regards
Kaleem Ahmad
Firas A. wrote:
>
> Hi,
>
>
> 1) Are you feeding RF2400 directly from signal generator or by Antenn
. [2.41e9, 2.42e9,
2.43e9, 2.44e9, 2.45e9]), rather to set max and min center frequencies then
what can be the problem in that?
Best Regards
Kaleem Ahmad
Firas A. wrote:
>
> Hi,
>
> 1) use "--tune-delay" with 10e-3
>
> 2) Uncomment :
> #self.connect(self.u, s2v,
Hi,
I am using RFX2400 + USRP + SUSI.
In one line what I want to doI want to find signal amplitude at a given
frequency. Or other wise I want to find the signal level at any frequency
just as graphically shown by fft_sink (the peak of the signal).
For this I started with usrp_spectrum_sense
card.h presence... yes
checking for sys/soundcard.h... yes
Best Regards
Kaleem Ahmad
http://www.nabble.com/file/p20271684/Config%2Bresult Config+result
--
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e one please tell me how I can implement such frequency
sychronizer(or may be you can say I want to implement PLL). How can I detect
the peak? and How I can find the frequency of that peak?
Best Regards
Kaleem Ahmad
--
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http://www.nabble.com/Transmitter-Rec
to some example code
(which contain top_block and gui).
Best Regards
Kaleem Ahmad
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value?
Thanks in advance
Kaleem Ahmad
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Discuss
-
Best Regards
Kaleem Ahmad
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(this=0x8d74a20,
arg=0x0)
at gr_scheduler_thread.cc:98
-
Can some help me to understand it and let me know where is the error.
Best Regards
Kaleem Ahmad
Eric Blossom wrote
.So please guide me if I am doing
something wrong? and suggest me how can I proceed?
Best Regards
Kaleem Ahmad
Eric Blossom wrote:
>
> On Thu, Oct 09, 2008 at 07:29:51AM -0700, kaleem ahmad wrote:
>>
>> Hi,
>>
>> I am using USRP+RFX1400+SUSI
>>
>
Thanks Johnathan and Eric,
Please dont consider my last mail, because the way Johnathan suggested is
working but I have some other problems.
Best Regards
Kaleem Ahmad
kaleem ahmad wrote:
>
> Thanks Johnathan,
>
> I am tring following as you suggested:
>
> "The usrp.
it is also not working? any suggestion for both of these methods?
Best Regards
Kaleem Ahmad
Johnathan Corgan-2 wrote:
>
> On Fri, Oct 10, 2008 at 9:02 AM, kaleem ahmad <[EMAIL PROTECTED]>
> wrote:
>
>> Addition to my above question I also want to know how can I connec
I
can again change some parameters of usrp.source_c and can process the sink
of corresponding flowgraph. BUT FOR THIS BOTH FLOWGRAPHS SHOULD BE CONNECTED
TO usrp.source_c AS WE CAN HAVE ONLY ONE usrp.source_c OPEN AT A TIME????
Is above idea correct and how can I construct such graph
Best Regards
e taken to avoid this?
Any clue will be great help for me.
Best Regards
Kaleem Ahmad
Eric Blossom wrote:
>
> On Thu, Oct 09, 2008 at 07:29:51AM -0700, kaleem ahmad wrote:
>>
>> Hi,
>>
>> I am using USRP+RFX1400+SUSI
>>
>> I am using follow
next size (fast): 0x08fcd970
***
Segmentation fault
Can you suggest what can be the problem and what can I do to solve it.
Thanks
Kaleem Ahmad
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Hi,
I am using RFX2400+USRP+SUSI
I am using following flowgraph to transmit data:
gr.file_source -> gr.simple_framer -> gr.bytes_to_syms ->
gr.interp_fir_filter_fff -> gr.frequency_modulator_fc ->
gr.multiply_const_cc -> usrp.sink_c
When I start the flowgraph by either start() or run() or Main
+ RFX2400 + SUSI
Best Regards
Kaleem Ahmad
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Any suggestions!!
kaleem ahmad wrote:
>
> Hi Eric,
>
> Two nodes, each consists of one USRP and an RFX2400, are involved, one as
> a Master(Transmit ... receive echoed version...Transmit new packet and so
> on) and the other USRP is Slave (Receive...echo back the rec
ng which I want to know is the order of connect() and
disconnect_all(), is it possible to have like this and will it work with
such delays.
Best Regards
Kaleem Ahmad
Eric Blossom wrote:
>
> On Tue, Sep 30, 2008 at 02:09:47AM -0700, kaleem ahmad wrote:
>>
>> Any suggestions!
implement
such a cyclic graph) and is there any example code which doing something
like this or otherwise can you please suggest me some way to do this.
Please either suggest some solution to 'cant open usb devicecant open
USRP 0/1', or to this cyclic-reconfigurable graph.
T
Any suggestions!!!
kaleem ahmad wrote:
>
> Hi Eric and others,
>
> I also have a similar problem, but it is not limited to 'gain control',
> Actually I want to implement an echo back or ping pong transmission
> system.
>
> First I implemented
OK thanks I solved the problem!!!
kaleem ahmad wrote:
>
> Hi,
>
> I want to implement an infinite loop which receives data (using USRP +
> RFX2400) in a vector_sink_b(). The packets are sent by a transmitter after
> every 't milliseconds'. I tried the code given at
Hi,
I want to implement an infinite loop which receives data (using USRP +
RFX2400) in a vector_sink_b(). The packets are sent by a transmitter after
every 't milliseconds'. I tried the code given at the end of paragraph. But
it doesnt works and problem which I am facing is that it receives the f
then disconnect and connect with receive blocks and so on...
Is it possible and is there any example code which doing something like this
or otherwise can you please suggest me some way to do this.
Thanks
Kaleem Ahmad
Eric Blossom wrote:
>
> On Fri, Sep 26, 2008 at 06:40:29PM -0700, K
this formulae to
traditional dB formulae i.e. 10log(input), or 20log(input).
Best Regards
Brian Padalino wrote:
>
> On Mon, Sep 22, 2008 at 9:19 AM, kaleem ahmad <[EMAIL PROTECTED]>
> wrote:
>>
>> Hi All,
>>
>> I am using USRP+RFX2400
f.fft_size,
-20*math.log10(self.fft_size)-10*math.log10(power/self.fft_size))
Best Regards
Kaleem Ahmad
--
View this message in cont
iption of error is same.
Can some one help me to solve this error.
If some one wants to have a look at code then complete code is attached.
Thanks
Kaleem Ahmad http://www.nabble.com/file/p19491587/tx_Master.py tx_Master.py
http://www.nabble.com/file/p19491587/rx_Slave.py rx_Slave.py
--
View
if someone can give me some clue about where this data
is being lost then it will be a great help
Best Regards
kaleem ahmad wrote:
>
> Any ideas or comments will be helpful for me and I am anxiously
> waiting!!!.
>
> Kaleem Ahmad
>
> kaleem ahmad wrote:
>>
>
Any ideas or comments will be helpful for me and I am anxiously waiting!!!.
Kaleem Ahmad
kaleem ahmad wrote:
>
> Hello everyone,
>
> I am trying to implement a simple FSK system to measure bit error rate
> (BER), and packet loss rate (PLR) using:
>
> 1-Linux
> 2-USRP
ilter_fff -> gr.frequency_modulator_fc ->
gr.multiply_const_cc -> usrp.source_c
Receive path flowgraph:
usrp.source_c -> gr.fir_filter_ccf -> gr.quadrature_demod_cf ->
simple_correlator -> gr.file_sink
Best Regards
Kaleem Ahmad
http://www.nabble.com/file/p19415046/fsk_rx.py fsk_rx.py
http:/
ve to add an extra packet.
Best Regards
Brian Padalino wrote:
>
> On Tue, Aug 12, 2008 at 11:39 AM, kaleem ahmad <[EMAIL PROTECTED]>
> wrote:
>>
>> Dear Brian,
>>
>> I have tried with different payload sizes and the maximum value I tried
>> was
>
burst, the filter
doesn't have anything left over to cause some weird transients at the
beginning of the burst."
Please give me a clue with little code if possible.
Thanks
Brian Padalino wrote:
>
> On Tue, Aug 12, 2008 at 7:33 AM, kaleem ahmad <[EMAIL PROTECTED]>
> wrote:
Hello Everyone,
If you run following code on your machine (I am using gnradio3.1.1 and this
code is also available in this version with a name 'fsk_loopback.py'
although it is removed in gnuradio3.1.2) then you will see that it will
transfer a file send.txt (Please create file named as "send.txt"
),
Gain = 0, but I have tried other values [0-20].
Thanks
George Nychis wrote:
>
>
>
> kaleem ahmad wrote:
>> If someone has ever measured Quality of service of received data (using
>> any
>> modulation and daughter board but preferably RFX2400) in terms of packet
&
If someone has ever measured Quality of service of received data (using any
modulation and daughter board but preferably RFX2400) in terms of packet
loss rate/Bit Error Rate (or any other metric) with USRP & GNU Radio without
any error correction (ARQ,FEC) mechanism (but no problem if you have wit
d it empty.
What can be the problem....???
Kaleem Ahmad
Firas A. wrote:
>
> Hi,
>
>
> 1) See :
> http://gnuradio.org/trac/wiki/UsrpFAQ
> http://gnuradio.org/trac/wiki/UsrpFAQ/Clocking
> http://gnuradio.org/trac/wiki/UsrpFAQ/Gen
>
> 2) To make nearly 0 Hz fr
rors is still there, then you have to search for another reason.
>
> Regards,
>
> Firas
>
>
>
> --- On Wed, 7/23/08, kaleem ahmad <[EMAIL PROTECTED]> wrote:
> From: kaleem ahmad <[EMAIL PROTECTED]>
> Subject: Re: [Discuss-gnuradio] FSK with RFX2400
> To: Dis
Hi,
Can some one explain in a little bit detail how this software PLL can be
implemented and how this synchronization can be acheived. I am using RFX2400
and facing same problem.
First I tried to solve the problem by calculating the frequency shift at
receiver end by using usrp_fft.py and then b
favour of Linux. But if you
still need some more info then please let me know.
Thaks
Patrick Strasser wrote:
>
> kaleem ahmad wrote am 2008-07-23 11:38:
>> Dear All,
>>
>> Can anyone also address the first part of my question aslo, I mean how to
>> improve th
send.txt for transmitter
./fsk_tx.py -f rcv.txt for receiver (But dont forget to empty rcv.txt before
running this)
I'll be thankfull if you can point out the reason.
Thanks
trondeau wrote:
>
> Quoting kaleem ahmad <[EMAIL PROTECTED]>:
>
>>
>> Dear All,
>>
>
Dear All,
Can anyone also address the first part of my question aslo, I mean how to
improve the quality of received data. I mean is it normal with GNU
Radio/USRP that we receive so currupt data or I am doing something wrong.
Any suggestion please...
Thanks
Matt Ettus wrote:
is by default
there with RFX2400.
I am thankful in advance.
Kaleem Ahmad
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