pure g-mode or in
802.11b 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
___
Discuss-gnur
i Devices 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 wr
486.html#a63508
On 30 March 2017 at 01:56, Bastian Bloessl 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 have a BladeRF, so I h
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 consecutiv
an ΒΌ 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
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
d using the phase value at the peak 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
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 correlatio
irst 55 samples zeroed and the 56th
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
mment "it is not expected that a device/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:
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)
Is
/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 wrote:
> I am trying to extend the
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? Sugge
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 c
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