Hi all,
I just finished installing Ubuntu 18.04 on one of my systems and tried
installing GNURadio using pybombs. The build seems to be misbehaving and
isn't fully unattended.
Mine is an x86_64 machine.
1. UHD: For some reason, cmake starts to use 'pthreads' instead of
'pthread' and the system
Hi all,
I am trying to implement an adaptive modulation scheme for OFDM using the
example ofdm_tx as initial source. To change the modulation scheme
dynamically, I am thinking of changing the Symbol Table in the block
'Chunks to Symbols' for the Payload.
a. Does this approach sound correct?
/archive/html/discuss-gnuradio/2015-10/msg8.html
Now, what other options do I have? Is it possible to connect to a message
port insde the hierarchical block from outside?
Warm regards,
Anshul
Warm regards,
Anshul Thakur
On 5 April 2018 at 21:33, Anshul Thakur <anshultha...@rediffmail.com>
I am trying to extend the gr-osmosdr source block with a PMT message sink
to send messages to it during runtime (to say, change the sample rate). I
intend to develop this as a part of a differnt OOT module.
How do I add such dependencies in the CMake list? (I am not very conversant
with Cmake)
vice/stream
> would ever spit out zero values.",
> I did have 0 values from a USRP device, see discussion in
> http://lists.ettus.com/pipermail/usrp-users_lists.
> ettus.com/2017-October/026851.html.
>
>
>
> On Sat, Mar 31, 2018 at 6:52 AM Anshul Thakur <anshultha.
input onward is then same for both.
P.S.: The source stream is a 1.2 Gigs file, so haven't uploaded it. If
you'd like I can do that too. It was generated by using a DVB-T2 Tx block
and writing the output into a file sink.
Warm regards,
Anshul Thakur
On 31 March 2018 at 02:27, Müller, Marcus (CEL)
Hi,
I used a circular buffer of finite size to keep the past 'N' power values
of the sample stream in my block as a part of creating a running sum. This
buffer is initialized to 0 in the constructor.
The running sum of powers is used to compute the average power used in
computing signal
directly, but it does not lead
to a meaningful P1 pre-signaling signal after DBPSK demodulation [2].
[1] DVBT2 Implementation Guidelines, Section 10.2.2.6 P1 Validation
[2] DVBT2 Standard ETSI EN 302 755 V1.4.1, Section 9.8.2.2
Warm regards,
Anshul Thakur
On 15 March 2018 at 22:29, Anshul Thakur
Hi Achilleas,
Thank you for this. Incidentally, this code matches the peak detection
algorithm used in gr-dab too (and IIRC, gr-dtv dvbt Receiver too).
Though this code doesn't explicitly remedy the problem I was facing, it
still has a fairly good implementation (post data-smoothening). I'll use
than ¼ of the
> P1 length), and as a bonus, the correlation coefficient's phase allows
> for a relatively robust frequency offset estimate. You can use that
> estimate to correct your receive signal and get a better detection
> result :)
Best regards,
> Marcus
>
> On Tue, 2018-03-13 at
Hello all,
I am trying to implement a DVB-T2 receiver's P1 symbol detection block
using C++ in GNURadio. From a non-real time code in MATLAB, I can see that
the correlation peaks during the P1 symbols are almost 50 to 100 times
larger than the rest of the time. This rise is not steep in
486.html#a63508
On 30 March 2017 at 01:56, Bastian Bloessl <m...@bastibl.net> wrote:
> Hi,
>
> On 03/29/2017 07:01 PM, Anshul Thakur wrote:
> >
> >
> > You could also test different RX/TX gains and parameters for the
> padding
> > block (I don't h
are detected.
- I also tried putting a direct line between the Tx of one SDR to Rx of the
other. Still no reception.
Are there some parameters which I could tweak to get this working? Or
something that I might be doing wrong?
Regards,
Anshul
On 26 March 2017 at 23:00, Bastian Bloessl <m...@ba
compatibility mode.
No output. What I see at Rx is a fairly continuous value of about 1 unit.
Tried these with all 5,10 and 20msps settings.
Could someone explain what I might be doing wrong?
Regards,
Anshul Thakur
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