Winston,
You can use the LTE_file_recorder application, which is part of my openLTE
project, to record an LTE downlink signal. It supports Ettus B2X0, hackrf,
bladerf, and rtlsdr hardware.
You can find the project details at:
http://sourceforge.net/projects/openlte/
Hope this helps,
Ben
On Mar
I am pleased to announce version 00.05 of openLTE, an open source LTE
project (sourceforge.net/projects/openlte). This version includes a
gnuradio application that reads recorded I/Q downlink LTE data from a
file, decodes MIB and SIB1, and displays the decoded information.
This information include
ut the Wireless Innovation Forum's call for
> proposals on open LTE frameworks?
> http://www.businesswire.com/news/home/20120327006941/en/
>
> This might be a good candidate to pursue it if you are interested.
>
> Tom
>
>
> On Sat, Apr 28, 2012 at 9:26 PM, Ben Wojtow
Thomas,
Thanks for giving it a try!! If you get me your VZW recording, I can
take a closer look to see what is going wrong with the SIB decoding.
Thanks,
Ben
On Tue, May 1, 2012 at 7:46 PM, Thomas Tsou wrote:
> On Sat, Apr 28, 2012 at 9:26 PM, Ben Wojtowicz wrote:
>> I am pleased to
Isabella,
If you are looking for a LTE modulator/demodulator, I have a project
called openLTE (sourceforge.net/projects/openlte) that accomplishes
much of this. It does not currently support all of the LTE
specifications, but might be enough to get you going.
Regards,
Ben
On Mon, Jul 2, 2012 at
Karen,
I have implemented 2x1 alamouti encoding/decoding in openLTE (
http://sourceforge.net/projects/openlte/).
Hope this helps,
Ben
On Apr 8, 2013 5:53 AM, "Karan Talasila" wrote:
> HI
>
> Has there been any implementation of alamouti code on gnuradio for a 2*1
> mimo setup. Any ideas or refe
Dincer,
I believe that you will need to add a resampler to the openLTE code in
order to run on a USRP. I don't have a USRP myself, but I believe that
they only allow sample rates that are integer divisions of 100Msps (except
the USRP B200 series). In order to get a valid LTE sample rate (30.72,
t right now. Then, it would be “easy” to add a resampling
> block to your code.
>
> If not, could you also please give a hint about how it can be done in your
> source code?
>
> ** **
>
> Regards, Dincer
>
> *Von:* Ben Wojtowicz [mailto:bwojt...@gmail.com]
&g
Adib,
I have started some LTE phy work. My long term plan is to develop it using
GNU radio. However, most of it is currently in matlab and I need some LTE
PHY test data in order to validate it. If anyone has any data (specifically
recorded downlink I/Q data) it would be extremely helpful.
Ben
:
>
>
>
> Ben Wojtowicz wrote:
> >
> > Adib,
> >
> > I have started some LTE phy work. My long term plan is to develop it
> > using
> > GNU radio. However, most of it is currently in matlab and I need some
> LTE
> > PHY test data in order to validate i
Operator,
Are you saying that you are seeing 4MHz wide signals? Or are you seeing
~200KHz wide signals seperated by 4MHz?
If you are seeing 4MHz wide signals, they are not GSM. There is most likely
another technology being transmitted.
If you are seeing ~200KHz wide signals spaced by 4MHz, the
Isaac,
You are right, the midamble waveform is dependent on the data bits occuring
before the midamble. However, the dependency is just a constant phase
offset. Therefore, correlation with the GMSK modulated midamble bits will
still result in good correlation scores. One more point is that the
I agree with Bob, most gsm demodulators I have seen use a viterbi equalizer
(sometimes called MLSE equalization).
Ben
On 6/6/08, Bob McGwier <[EMAIL PROTECTED]> wrote:
>
> This is not my professional experience. The sounding data is used to find
> the channel and then the data symbols are soft
gt; [mailto:discuss-gnuradio-bounces+jplong
> [EMAIL PROTECTED] On Behalf Of
> Steven Clark
> Sent: Friday, June 06, 2008 10:58 AM
> To: Ben Wojtowicz
> Cc: Discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] gsm gmsk demodulation
>
> > On 6/6/08, Bob McGwier <[
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