[Discuss-gnuradio] Cycle time calculation

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

[Discuss-gnuradio] Cycle time calculation

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

[Discuss-gnuradio] Can threading disturb sensing continuety

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

Re: [Discuss-gnuradio] Can threading disturb sensing continuety

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

Re: [Discuss-gnuradio] Can threading disturb sensing continuety

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

Re: [Discuss-gnuradio] Can threading disturb sensing continuety

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

Re: [Discuss-gnuradio] Can threading disturb sensing continuety

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

Re: [Discuss-gnuradio] Can threading disturb sensing continuety

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

Re: [Discuss-gnuradio] Can threading disturb sensing continuety

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

[Discuss-gnuradio] cycle/period detection of a cyclic/periodic transmitter

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

Re: [Discuss-gnuradio] cycle/period detection of a cyclic/periodic transmitter

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

Re: [Discuss-gnuradio] cycle/period detection of a cyclic/periodic transmitter

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

Re: [Discuss-gnuradio] cycle/period detection of a cyclic/periodic transmitter

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, > >>

[Discuss-gnuradio] Cycle time detection for an unknown cyclic radio system

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

Re: [Discuss-gnuradio] Cycle time detection for an unknown cyclic radio system

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

[Discuss-gnuradio] parallel data reception

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

Re: [Discuss-gnuradio] parallel data reception

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

Re: [Discuss-gnuradio] parallel data reception

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

Re: [Discuss-gnuradio] parallel data reception

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) >> >>

[Discuss-gnuradio] 2 RX and 1 TX channel

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

Re: [Discuss-gnuradio] 2 RX and 1 TX channel

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

Re: [Discuss-gnuradio] 2 RX and 1 TX channel

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

Re: [Discuss-gnuradio] 2 RX and 1 TX channel

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

Re: [Discuss-gnuradio] 2 RX and 1 TX channel

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

[Discuss-gnuradio] Multichannel problem

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

[Discuss-gnuradio] FSK with RFX2400

is by default there with RFX2400. I am thankful in advance. Kaleem Ahmad -- View this message in context: http://www.nabble.com/FSK-with-RFX2400-tp18587205p18587205.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnu

Re: [Discuss-gnuradio] FSK with RFX2400

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:

Re: [Discuss-gnuradio] FSK with RFX2400

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, >> >

Re: [Discuss-gnuradio] FSK with RFX2400

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

Re: [Discuss-gnuradio] 64MHz USRP Oscillator

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

Re: [Discuss-gnuradio] FSK with RFX2400

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

Re: [Discuss-gnuradio] FSK with RFX2400

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

[Discuss-gnuradio] Packet Loss Rate/Bit Error Rate

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

Re: [Discuss-gnuradio] Packet Loss Rate/Bit Error Rate

), 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 &

[Discuss-gnuradio] Last two data Blocks are always missing

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"

Re: [Discuss-gnuradio] Last two data Blocks are always missing

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:

Re: [Discuss-gnuradio] Last two data Blocks are always missing

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 >

[Discuss-gnuradio] RFX2400+USRP buffers

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:/

Re: [Discuss-gnuradio] RFX2400+USRP buffers

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

Re: [Discuss-gnuradio] RFX2400+USRP buffers

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: >> >

[Discuss-gnuradio] Error : usb_claim_interface: failed interface 1

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

[Discuss-gnuradio] sensed spectrum in dB???

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

Re: [Discuss-gnuradio] sensed spectrum in dB???

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

Re: [Discuss-gnuradio] Dynamically changing parameters of a block

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

[Discuss-gnuradio] vector_sink read problem

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

Re: [Discuss-gnuradio] vector_sink read problem

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

Re: [Discuss-gnuradio] Dynamically changing parameters of a block

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

[Discuss-gnuradio] Small point but serious problem for me

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

Re: [Discuss-gnuradio] Dynamically changing parameters of a block

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!

Re: [Discuss-gnuradio] Dynamically changing parameters of a block

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

[Discuss-gnuradio] How can I check usrp.sink_c

+ RFX2400 + SUSI Best Regards Kaleem Ahmad -- View this message in context: http://www.nabble.com/How-can-I-check-usrp.sink_c-tp19780504p19780504.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list

[Discuss-gnuradio] Implementing controlled transmission

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

[Discuss-gnuradio] Error while receiving

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 -- View this message in context: http://www.nabble.com/Error-while-receiving-tp19900161p19900161.html Sent from the GnuRadio mailing list archiv

Re: [Discuss-gnuradio] Error while receiving

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

Re: [Discuss-gnuradio] Error while receiving

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

Re: [Discuss-gnuradio] Error while receiving

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

Re: [Discuss-gnuradio] Error while receiving

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.

Re: [Discuss-gnuradio] Error while receiving

.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 >> >

Re: [Discuss-gnuradio] Error while receiving

(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

[Discuss-gnuradio] Help required in understanding backtrace

- Best Regards Kaleem Ahmad -- View this message in context: http://www.nabble.com/Help-required-in-understanding-backtrace-tp20065799p20065799.html Sent from the GnuRadio mailing list archive at Nabble.com

[Discuss-gnuradio] Transmission power and GUI

value? Thanks in advance Kaleem Ahmad -- View this message in context: http://www.nabble.com/Transmission-power-and-GUI-tp20127597p20127597.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss

[Discuss-gnuradio] How to use GUI with gr.top_block

to some example code (which contain top_block and gui). Best Regards Kaleem Ahmad -- View this message in context: http://www.nabble.com/How-to-use-GUI-with-gr.top_block-tp20225893p20225893.html Sent from the GnuRadio mailing list archive at Nabble.com

[Discuss-gnuradio] Transmitter-Receiver synchronization

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 -- View this message in context: http://www.nabble.com/Transmitter-Rec

[Discuss-gnuradio] usrp cant be built error while installing gnuradio 3.1.3

card.h presence... yes checking for sys/soundcard.h... yes Best Regards Kaleem Ahmad http://www.nabble.com/file/p20271684/Config%2Bresult Config+result -- View this message in context: http://www.nabble.com/usrp-cant-be-built-error-while-installing-gnuradio-3.1.3-tp20271684p20271684.htm

[Discuss-gnuradio] fft realated problems

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

Re: [Discuss-gnuradio] fft realated problems

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

Re: [Discuss-gnuradio] fft realated problems

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

[Discuss-gnuradio] 'unable to coerce endpoint' Error

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

Re: [Discuss-gnuradio] fft realated problems

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

Re: [Discuss-gnuradio] 'unable to coerce endpoint' Error

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

Re: [Discuss-gnuradio] fft realated problems

. [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,