Wow, it's so cool! I'll have a try, following your wiki. -Lin
2015-05-06 4:06 GMT+08:00 Tom Rondeau :
> While I have been talking around it for a while, I wanted to better
> publicize our work on GNU Radio for Android. We can now build applications
> that run GNU Radio flowgraphs on Android (>= 5
Dilip,
So you just use CORNET remotely. Well, I think you should try different
parameters...
They use Custom developed USRP2 daughterboard based on the Motorola RFIC4.
I didn't find "*specifications on the "custom daughterboard"*" in the FAQ.
Lin
2013/8/15 dilip thapa
> Lin,
>
> actually it i
1 km is a long distance, so the lower frequency, the less pathloss. Use
maximum tx gain and rx gain.
And the distance may highly depend on the environment. Is there buildings,
trees, or just a blank space?
Lin
2013/8/15 dilip thapa
> Hi,
>
> I am using usrp2 and gnuradio 3.3.0.
> I want to use
Hello est, Albert, and all,
I read a paper, 'Picasso: Flexible RF and Spectrum Slicing', from SIGCOMM
2012 recently. And I found it gives a solution to integrate many spectrum
bands into one antenna and RF chain.
Basically, Picasso uses a very wideband AD/DA and then digitally slices the
spectrum
>
> Even with LTE you have to deal with 12 freq. bands?
>
>
> On Tue, Jan 15, 2013 at 4:03 PM, Lin HUANG wrote:
>
>> ASIC is always the best performance-price choice.
>
>
>
>
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cing ICE into GNU Radio, as I expect happily, would make
> distributed SDR possible, that means if we need more computing power for
> real-time communication, we might be able to add more computers with
> careful splitting tasks among these computers! And these programs are
> written in hig
Hi Albert,
If that is as you said, Icera won't open the instruction set and develop
tool, and all the software are encrypted. Then this chipset is not suitable
for people like GNU Radio guys to DIY something. So, what is the major
market of this chipset? Cellphone manufactor? Let them to develop m
is a FDD LTE system.
2011/8/17 Alexander Chemeris
> Thank you, I will try.
>
> Do you know what flavor of LTE do they implement? Is it something
> which can be useful in Europe, or it's only Chinese version of LTE?
>
> On Mon, Aug 8, 2011 at 13:47, Lin HUANG w
Try this:
http://www.openairinterface.org/overview/page1011.en.htm
Lin
2011/8/4 Thomas Tsou
> On Tue, Aug 2, 2011 at 7:31 PM, Lin HUANG wrote:
> > This link is for download.
> > https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/GetSources
> > But the username seems
At least L1, we spent a lot of time on checking the code's compliance with
spec.
I heard the RRC part is not completed.
Lin
2011/8/4 Alexander Chemeris
> Hi Lin,
>
> On Wed, Aug 3, 2011 at 06:31, Lin HUANG wrote:
> > This link is for download.
> > https://twiki
ted with your progress, this is very interesting.
>
> On Tue, Aug 2, 2011 at 14:20, Lin HUANG wrote:
> > A very late message ;)
> > There is one open source LTE implementation in Eurecom, named as
> > OpenAirInterface
> > https://twiki.eurecom.fr/twiki/bin/view/OpenAi
A very late message ;)
There is one open source LTE implementation in Eurecom, named as
OpenAirInterface
https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/WebHome
We are now trying to connect this with USRP by UHD.
Lin
2011/5/4 Alexander Chemeris
> Adib,
>
> We're working on an open-so
I like "powered from the USB port" too !!
But I know what William want to make now. That will be a half-size
USRP mother board + single daughter board, placed in a small
underwater vehical, and powerd by vehical battery, right? It sounds
interesting!
Lin
2010/8/30 Mark J. Blair :
>
> On Aug 30,
Will it support FDD full duplex? I'd like to run OpenBTS on a smaller USRP.
-Lin
2010/8/28 William Cox :
> Yes, same functions, just smaller and only one rx/tx pair.
> -William
>
> On Friday, August 27, 2010, Abdalaleem Andy James Potter
> wrote:
>> Would it have the same functionality?
>>
>>
>>
I've met the same problem. At the tail of each burst, the ofdm
waveform always becomes a constant line. So the last several ofdm
symbols are always error received. I guess it is caused by the RF
part, but I'm not sure.
My solution is to add some padding bits in the tail of each burst.
-Lin
在 2010
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 met similar problem about the USRP2 transmitting. When I record the
received signal I found the signal that USRP2 transmitted out is not
continuous. Some signal segements are lost. This problem is independent with
the data rate.
And this problem appears in some DELL computers but doesn't appear
Congratulations!! Thanks a lot for your contribute!
Recently I'm also interested in 802.11p. I'v very glad to see this. :)
Lin
2010/1/18 Paul Fuxjäger
> Hello Everyone,
>
> we are glad to announce that our IEEE802.11a/g/p OFDM frame encoder has
> passed the last round of testing and is now fin
The throughput depends on how optimal and fast the program you write is.
I'm not familar with Turbo decoder theory. In 2007, we used turbo decoder
from IT++ libary (http://sourceforge.net/apps/wordpress/itpp/). It is faster
than that we wrote. It supports a 64 kbps (One CPU) and 384 kbps (maybe 3
C
It is possible I think. The current synchronization method only uses the
inserted preambles. If you don't change the preamble, it will not affect the
synchronization.
You may add a Code block into the transmitter diagram, also you need to
change some parameters of other blocks. But for the receive
Hello all,
I tried 'ofdm example' on my two computers. I used 'benchmark_ofdm_tx.py'
and 'benchmark_ofdm_rx.py' for test.
1. If I use computer A as transmiter and computer B as receiver. The
transmission is successful.
2. But if I take B as transmitter and A as receiver. B will report
'usrp2::tx_
suggest you open the "logging" flag, then have a look at the data file to
find which block doesn't work well.
2009/9/25, zhenhuan86 :
>
>
> Hi everyone, now I have one a USRP device with two RFX 2400. when i try to
> use the example in
> gnuradio-example/python/ofdm/ benchmark_tx/rx.py. i use thi
YES. I also found this fact that the dynamic ranges of two usrps are so
different, just in these days.
Furthermore, the range of usrp.source_32fc is also +-1.0, right? Because I
found the sample amplitude is very small when I use usrp2_fft.py observe the
same RF input on USRP2, compared with usrp_
Hi Matt and all,
We keep waiting for the USRP2 available and plan to use it upgrade our
platform's bandwidth. How is it going now? Do you wish to publish it before
SDR'08 Tech Conf?
BR
HUANG Lin
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Yes. This document will be helpful.
I think VLC has friendly user interface so maybe you just install it then
you will know how to start it.
If the data rate of your gnrradio link is very low, you have to set small
size of the image (e.g. 480*320) and very low bit rate to the video codec
(bad quali
You may try 'VideoLAN'. It supports IP streaming output and input. Then you
can make your TX RX as an IP tunnel.
BR
HUANG Lin
2008/6/19, Brook Lin <[EMAIL PROTECTED]>:
>
>
> Hi All,
>
> I am using benchmark_tx.py and benchmark_rx.py to transmit and receive
> video
> file. For now, I have a video
Thank you so much! This is very useful for me to introduce USRP to other
people.
Thank you! Firas!
BR
HUANG Lin
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Hello all,
Our team also implemented a MIMO-OFDM platform in the past few months. The
system parameters are like LTE. But it is not fully in GNU Radio framework,
so it's not suitable to be imported. One paper introducing this platform
will be published in SDR07 Tech Conference. Unfortunately I can
2007/6/24, CHEN,ZHIFENG <[EMAIL PROTECTED]>:
Hi,
I am a beginner in USRP for GNU Radio. I just buy two sets of USRP
with RFX900 for our project. There is no any documents together
with the package. That is fine for play USRP monther board. I have
test the USRP and it is fine. But when I want to
Hello all,
Just update the status of our broken boards. Now they are fixed up. :) We
replaced the amplifier chip, U4 MGA82563, with a new one. Then everything
works now.
Good luck
HUANG Lin
2007/6/6, Lin HUANG <[EMAIL PROTECTED]>:
I'd like to report to all of you our investigat
side. And I connected the 6V power
of TX side with the power pin of the control part (U203), because the power
of RX is not normal. Then the TX side can work.
Thanks a lot for Ettus's help.~
HUANG Lin
2007/5/30, Lin HUANG <[EMAIL PROTECTED]>:
I continued checking these broken board
I continued checking these broken boards recent days. I found for the TX
side, the graph stops as soon as it starts. It seems the daughter board
gives some signal to stop the motherboard to load data from PC. I read the
.sch file in the subversion repository and the defination of the interface
be
s are usually open
because we often plug in and out the daughterboard. At that time we are
always very careful.
So we are very confused. What's the reason?
HUANG Lin
2007/5/24, Eric Blossom <[EMAIL PROTECTED]>:
On Thu, May 24, 2007 at 07:35:15PM +0800, Lin HUANG wrote:
> Hi eve
Hi everybody,
I'm the colleague of Hanwen. Today I checked the broken board. I need your
help especial Ettus' help.
We can assure that the mother board is OK, because when we plug other
rfx2400, it works well. For this broken rfx2400:
1. The switch control signal, U204 7404
A1 B1 A2 B2 : 0 1 0
In gnuradio-examples/python/multi-antenna or multi_usrp
Lin
2007/1/22, Roberto Mastrodonato <[EMAIL PROTECTED]>:
Hi
where cai I find MIMO USRP codes?
10x
R
2007/1/19, Lin HUANG <[EMAIL PROTECTED]>:
>
> Hi Roberto,
>
> I don't think there is code related to S
Hi Roberto,
I don't think there is code related to Smart Antenna, but many people are
working on MIMO-USRP. The difference between them is the correlation between
antennas. If you have antenna array for smart antenna, I think you may
utilize some code of MIMO.
Lin
2007/1/18, Roberto Mastrodona
2007/1/15, science quest <[EMAIL PROTECTED]>:
Hi
My appologies if the question is too vague or sounds naive-
I have read a number of papers(specially IEEE communication society
journals) on synchronization issues in communication- frequency, time and
phase sync. All these papers address the
Oh, recently I'm also confused with the IF issue. Now I see. This is a
"zero-IF" architecture, right?
The A/D conversion rate is fixed at 64M. If you want to change the
frequency, maybe you can give another clock source outside. 1 bit
quatization seems possible. I remember there are some emails di
It is not the same type of product as USRP. It don't need to work with GNURadio I think. The products of xilinx, including other big companies, Spectrum, ICS, Pentek... can complete all the signal processing on the board. They have high processing speed, fast real-time reaction performance. The cos
Yes, I knew that. That will be a really great improvement. I've been waiting for that. :) But I don't know when it'll be ready for all of us. ;P How about the time schedule?
alin
2006/10/12, Eric Blossom <[EMAIL PROTECTED]>:
On Tue, Oct 10, 2006 at 04:38:47PM +0800, Lin Hu
'm done with the document in case anybody wants to look at it.
On 10/5/06, Lin Huang <[EMAIL PROTECTED]
> wrote:
I don't think now there is available GNU radio modules for WLAN tranceiver. The FPGA is used as DDC/DUC.
Maybe you can directly save the signal into files and then do the
I don't think now there is available GNU radio modules for WLAN tranceiver. The FPGA is used as DDC/DUC.
Maybe you can directly save the signal into files and then do the correlation or other processing.
Alin
2006/10/5, Lin Ji <[EMAIL PROTECTED]>:
Hi,
I'm working with analyzing WLAN signals
I think it's better for you to modify it by yourself. Maybe just
replace some components if they are not difficult to find in the
electronic market. And it's a chance to learn more about this board.
Alin
2006/9/27, hanwen <[EMAIL PROTECTED]>:
Sorry, Matt. I didn't mean to be such rude.
After I
I think it is under developing now. You may search 'm-block' or BBN in the discussion.
2006/9/19, [EMAIL PROTECTED] <[EMAIL PROTECTED]>:
I couldn't help but notice that there was a mention of TDMA on the Wiki:"Precision time stamping and synchronization for TDMA waveforms"
is this time stamp referr
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