t is the representation in continuous-time but in discrete time it can be
represented in the form of sample-count (samp-rate must be known).
nitems_writtenhttp://gnuradio.org/doc/doxygen/classgr_1_1block.html#a742128a481fcb9e43a3e0cd535a57f9e
hold the number of items produced by the block on
:* USRP-users [mailto:usrp-users-boun...@lists.ettus.com] *On
Behalf Of *Luke Hough
*Sent:* Thursday, January 23, 2014 3:22 PM
*To:* Adeel Anwar
*Cc:* usrp-us...@lists.ettus.com; discuss-gnuradio@gnu.org
*Subject:* Re: [USRP-users] [Discuss-gnuradio] B200 gain control and RF
input power
Adeel
Luke,
I am also doing a similar project in which i plan to use TR switch instead
of circulator because of high TX/RX isolation (60/70 dB) as compared to
isolators (20/30 dB).
Currently u are using power amplifier ZVE-8G which have output power ~=30
dBm so circulator will work as well but if u
Tom,
I am trying to use the Constellation Receiver Block and one of the
Parameters is Constellation Object. Is this a pointer to an object and
how/what creates this object? I have looked at the qam.py file but don't
follow how this relates to placing a block down in gnuradio companion.
In GRC u
In ur GR flowgraph, just add a const-multiply block before USRP-Sink and
multiply the Tx signal with it. Set its value between 0-1.
-Adeel
On Fri, Jul 26, 2013 at 5:29 PM, yeran yeran0...@hotmail.com wrote:
Hi Adeel,
I'm using RFX 2400 for experiment, there are no parameter
So far, I have install jack, changed my audio_module to jack and created
a sine wave flowing to an audio_sink.
When I execute the flow graph, nothing happens. (Is this expected?)
How can I capture this audio using VLC?
U can use GR UDP/TCP sink to send the audio samples from GNU Radio to VLC
or
Kay,
Freq offset can be added by multiplying the baseband data with
complex-exponential. In GR this can be done by any of the following ways
1. Sine Source and Multiply block or
2. Freq Translating FIR Filter
3. Channel Model
-Adeel
On Thu, Jul 25, 2013 at 8:26 PM, Yingjie Chen
for index = 1:PacketLength
PacketWithFreqOffset(index) =
Packet(index)*exp(i*2*pi*fΔ*SampleRate*index);
end
So is above implementation in matlab similar to that in Gnuradio?
No. GNURadio implementation resembles Simulink instead of Matlab. Just
think how can u add freq-offset in Simulink
Currently, what I'm doing is keep the tx-amplitude 0.2, and change the
gain from 35 to 65. You mean in this range, the power is not liner to gain
change, right? If so, is there any way to control or influence the power
change?
I was mentioning about the that total Tx-Power. U can control Tx-power
program in GR using signal Block or widget instead of writing all code
directly?
Sent from my iPhone
On 25 Jul, 2013, at 23:47, Adeel Anwar adeela...@gmail.com wrote:
for index = 1:PacketLength
PacketWithFreqOffset(index) =
Packet(index)*exp(i*2*pi*fΔ*SampleRate*index);
end
So
Ada,
once the signal has been up converted. Now I'm using 0.2 amplitude and 35
gain. But I don't understand, how come that the smaller the power is, the
better transmission performance there will be. And also, why does power
should be in the range of 0 to 1.0? How to calculate transmission power
Waqas,
U can use PFB_clock_sync instead of MM. PFB_clock_sync implements the
maximum likelihood estimation algorithms, so using this block increasing
sps should not produce incorrect results.
http://gnuradio.org/doc/doxygen/classgr_1_1digital_1_1pfb__clock__sync__ccf.html
-Adeel
On Sat, Jul
1. Still I have to insert a Packer Encoder between my code and the
GMSK mod? If yes, with which parameters? The GMSK mod is configured with
Samples/Sym=50 , BT=0.4.
No. U can make custom packet structure and in that case u need not to use
Packet-Encoder.
2. Can someone explain me how to use the
and samples from RSSi calculator come in the same time to the symbol
decision block. How can I tune this delay and is it deterministic?
Many thanks,
Nemanja
On Thu, Jul 18, 2013 at 2:33 AM, Adeel Anwar adeela...@gmail.com wrote:
Nemanja,
I built this block sometime back. The ideas
For BPSK, not using differential, is there any way to keep track of the
rotating so as to understand exactly what happened to each bit? Only after
understanding what happens to each bit in a single series of data, I can
work on how to joint them correctly.
Other than differential decoding,
Nemanja,
I built this block sometime back. The ideas is to construct a custom RSSI
Measurement block having input
1: complex IQ-samples after USRP-SRC or before AGC
2: byte-stream after digital_correlate_access_code_bb. Output byte stream
has data in LSB (1st bit) while Flag in 2nd bit shows
This was removed from RFX2400 sensors list. See
http://code.ettus.com/redmine/ettus/projects/uhd/repository/diff/host/lib/usrp/dboard/db_rfx.cpp?utf8=%E2%9C%93rev=715fd038325fa4a265328fac2bdb54850b990ea7rev_to=4b9d692f56dbc96b7e2defb889ed092388eeb332
Moreover u can check the list of all possible
Frank,
Currently, I am just saving off the data and then processing it in
Octave/Matlab. It would be nice to have a display of the range/Doppler map
that is updated periodically within GRC. This would give me a good
indication that everything is working without me having to save off the
data and
Baier,
For ur file-sink, what was the setting of unbuffered flag?
If unbuffered=off, file-sink will first buffer specified no. of items
before writing them to file, so there is a chance that when FG is stopped
some items at the end gets lost.
if unbuffered=on, file-sink will write items in file
grc file
--
*From:* Adeel Anwar adeela...@gmail.com
*To:* tom sutherland alphatoz...@yahoo.com; discuss-gnuradio@gnu.org
*Sent:* Friday, July 5, 2013 10:25 PM
*Subject:* Re: [Discuss-gnuradio] Simple QAM project
Can u attach ur GRC file?
-Adeel
On Fri
http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#Experts-only-How-can-I-deliberately-install-GNU-Radio-multiple-times-different-versions
On Fri, Jul 5, 2013 at 12:45 PM, 周崴 lonelysai...@163.com wrote:
___
Discuss-gnuradio mailing list
Can u attach ur GRC file?
-Adeel
On Fri, Jul 5, 2013 at 5:48 AM, tom sutherland alphatoz...@yahoo.comwrote:
I am trying to get data through a QAM-16 Modulator and just display the
data stream on a Constellation Sink. I have 8khz sampled 8-bit data(char)
going into the QAM Mod block. I have
so i checked the new grextras wiki it has uhd_control block i guess that
can be used for this job.
uhd_control block supports only a subset of usrp-functions (exposed
through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT
currently it doesn't support set_time_now()
Blum wrote:
On 06/16/2013 02:13 PM, Adeel Anwar wrote:
so i checked the new grextras wiki it has uhd_control block i guess
that
can be used for this job.
uhd_control block supports only a subset of usrp-functions (exposed
through gr-uhd) e.g. set_command_time, set/get_gain/freq etc
Dan,
You can define custom path in */.gnuradio/config.conf *OR export path
to* **GRC_BLOCKS_PATH
*environment variable. See
http://gnuradio.org/redmine/projects/gnuradio/wiki/GNURadioCompanion#Installing-the-XML-Block-Definition
-Adeel
On Fri, Jun 14, 2013 at 8:22 PM, Dan CaJacob
Shahab,
If u are asking about the delay between samples/commands sent from
GNU-Radio to USRP then OS/Ethernet delays maybe around 2-4 msec.
-Adeel
On Wed, Jun 12, 2013 at 8:37 AM, Shahab e shahab.s2...@gmail.com wrote:
Hi,
I would like to ask if anyone knows how long is the delay between a
Jay,
As per my experience with USRP-N210 and RFX2400, if gain setting are high
and this causes signal amplitude to be -20/30 dBm then the received
signal will be distorted.
To overcome this
1. Reduce Rx-Gain
2. OR Reduce Tx-Gain
3. OR Increase distance between USRP
This distortion maybe due
See this post in context
http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2012-September/005352.html
On Mon, Jun 10, 2013 at 7:13 AM, Marcus Leech mle...@ripnet.com wrote:
I believe that they are all dropped, but Josh can comment more
definitively.
on Jun 10, 2013, *Sean Nowlan*
Ada,
As I looked up from the documents, it was said that the signal after the
usrp source at the receiver, is baseband signal, whose central frequency
is around 0 Hz, and already take off the carrier frequency. But in the
demodulation, there are still freq_recov and time_recov block. Are they at
Kartik,
For connecting USRP with PC, Lan-card or switch should be 1-Gbps. USRP will
not connect with device supporting only 10/100Mbps
-Adeel
On Fri, May 24, 2013 at 12:54 PM, kartik sudarshan
kartiksudars...@gmail.com wrote:
Hi
I am Kartik and I have just started with GNU radio in ubuntu
Swrangsar,
For checking desktop's ethernet interface speed u can use ethtool
sudo apt-get install ethtool
ethtool eth0
-Adeel
On Fri, May 24, 2013 at 1:10 PM, swrangsar basumatary
swrangs...@gmail.comwrote:
Hi,
We installed the latest UHD-003.005.003 with gnuradio-3.6.4.1 on a 32-bit
PC
Irfan,
epsilon: Simulates Sampling-Clock-Mismatch. It uses rational-resampling for
interpolation/decimation. value=1 means no-mismatch i.e.
in-samp-rate=out-samp-rate. value=1.1 means receiver clock is
fast(sample added). value=0. means rcvr clock is slow (sample-skipped).
useful for
https://github.com/jmalsbury/pre-cog
-Adeel
On Sat, Mar 2, 2013 at 4:59 AM, manjusha yandamuri.ma...@gmail.com wrote:
Where can i download pre-cog? Please send me the link..
Thanks,
manjusha
--
View this message in context:
http://gnuradio.4.n7.nabble.com/Pre-cog-tp39943.html
Sent
Alex,
1: U can try adjusting the synchronization loops bandwidth (Phase/Timing
etc) see PFB_Timing documentation
2: Try reducing the receiver gain (for a constant tx-amplitude/gain) or
reduce transmission amplitude/gain (for constant rx gain)
-Adeel
On Sat, Mar 2, 2013 at 10:21 AM, Alex
Matthew,
If I set the QS1R to stream on a particular IP and port, can I just use
a UDP source block?
Yes can use UDP source block to stream QS1R samples to gnuradio
-Adeel
On Tue, Oct 2, 2012 at 6:27 PM, Matthew Biederman m...@mbiederman.com wrote:
hi tom,
thanks for your response,
-- Forwarded message --
From: Adeel Anwar adeela...@gmail.com
Date: Wed, Sep 26, 2012 at 3:52 AM
Subject: Re: [Discuss-gnuradio] using general_work when output rate is not
fixed
To: Rahman, Muhammad Mahboob Ur mahboob-rah...@uiowa.edu
Mahboob,
uhd usrp sink. Now, the other
*Priyankar*,
You can use vlc player to stream video at any udp port. In GnuRadio u can
use UDP Source/sink blocks.
TX FlowGraph:
vlc Streaming(UDP) - GR UDP Source - GR TX blocks
RX FlowGraph:
GR RX blocks - GR UDP Sink - vlc Open-Network-stream
-Adeel
On
Rakesh,
Matlab/Simulink USRP support package already ships with demos of FM Tx/RX
and QPSK TX/RX
See
http://www.mathworks.com/discovery/sdr/usrp.html
-Adeel
On Thu, Jul 26, 2012 at 10:57 PM, Rakesh K Gupta rakeshk.gu...@rolta.comwrote:
Dear All,
I am new to USRP. I want to
Dhrubo
,
demodulator-correlator-framer_sink
Correlator (input=1 bit-per-byte) detects the header while framer_sink
separates the payload.
Output of correlator the 1st bit location represents input data (1
bit-per-byte) while 2nd bit location represents the detection of header.
Framer sinks keeps
One thing i forgot , there should be upsample(pulse shaping ) OR repeat by
N block between chunk2symbol and fm modulator
On Thu, Feb 16, 2012 at 11:09 PM, Adeel Anwar adeela...@gmail.com wrote:
Anju,
Try connecting these
data_src(0,1)==chunk to symbol(-1,1)==fm
modulator(sensitivity=(2*pi
Anju,
Try connecting these
data_src(0,1)==chunk to symbol(-1,1)==fm
modulator(sensitivity=(2*pi*(freq_sep/2.0))/samp_rate))
where freq_sep = symb_rate (for non-coherent detection)
On receiver side u can use quadrature demoulator
-Adeel
On Fri, Feb 17, 2012 at 12:42 AM, anju babu
Dhrubojyoti,
In ur program u have set the Bitrate rate to 2MB/s. It exceeds the
computing power of ur PC that is why u are getting . These 'O' means
overflow i.e. USRP is producing data at faster rate than the ability of PC
to process
Try changing bitrate to 100-500 KB/s
-Adeel
On Sun, Jan
Song,
Every transmitted pkt has structure
preamble:access_code:header:payload_with_crc:'\x55'
header consists of 2 16-bit shorts, having payload length and whitener
offset.
On receiver side framer sink extracts the payload depending upon the
value of header (2 shorts).
see
Hello,
Synchronization blocks in GNU Radio are feedback based e.g FLL, PFB clock
Synch,MM Synch.
Control loop takes some time to minimize the error e.g benchmark_rx.py
takes 200+ symbols time
for FLL and PFB clock synch to lock.
In some bursty communication where we have to transmit only
In phasor form 1+0j = 10deg so no effect on amplitude and angle 0f Input
Output
similarly 1+1j = 1.141545deg i.e.input is scaled by 1.14(sqrt(2)) and
rotated by 45 degrees
-Adeel
On Mon, Nov 14, 2011 at 8:35 PM, Marcus M gnu.f...@gmail.com wrote:
Hi,
What is the difference between the effect
i think josh is right about the color. Instead of red, some shade of blue or
green might give a better look.
http://gnuradio.org/redmine/projects/gnuradio/wiki
instead of putting Start page, Index by Title, Index by Date buttons
on right-side,
they may be placed on the top of start page (maybe
Using GRC import block, i want to import some custom modules from a local
directory
(same directory contains grc files and other files that needs to be
imported), but it is giving error.
As i understood, GRC doesn't recognizes the directory in which we save
'*.grc' as its working directory
How can
. digital mentioned above)
Adeel
On Wed, Oct 5, 2011 at 11:55 PM, Josh Blum j...@joshknows.com wrote:
On 10/05/2011 11:50 PM, adeel anwar wrote:
Using GRC import block, i want to import some custom modules from a
local
directory
(same directory contains grc files and other files that needs
Hi,
Simulink have a block named Matlab Function, in which user can write
Matlab code and use it just like other simulink blocks,so does GRC have a
smilar block which supports gnuradio commands/function (for which GRC blocks
are not yet written ) or is such block planned in the future?
Regards,
Simulink and Labview have such blocks for code
On Fri, Sep 23, 2011 at 9:17 AM, Josh Blum j...@joshknows.com wrote:
On 09/22/2011 09:05 PM, adeel anwar wrote:
Hi,
Simulink have a block named Matlab Function, in which user can write
Matlab code and use it just like other simulink blocks,so
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