pseudo-FSK transmitter and your quadrature demod, the quadrature demod's
> output will actually be the same phase difference. Please, let the 1Sample
> per symbol question go for now.
>
> Best regards,
>
> Marcus
>
> On 22.07.2016 00:55, Olivier Goyette wrote:
>
>
,
>
> Marcus
>
> On 22.07.2016 00:42, Ed Criscuolo wrote:
>
> Your flowgraph intrinsically has one symbol per sample in the data
> generation portion. You need a resampler just ahead of the throttle to
> interpolate in order to increase the number of samples per symbol.
>
Hi all !
I've been working on this flowgraph for a while now and I've been able to
pinpoint what is not working, but I don't understand how to resolve this
so, that's why i'm asking for your guidance.
Take a look at the flowgraph i've joined. The thing that doesn't seem to be
working on this setu
Hi all !
I have a working Rx/Tx link and I want to be able to send what I receive as
messages. At the input, I have 34 bytes of data that I need to decode. For
example, the 1st 9 bits represent let's say velocity. So, what I would like
to do with this block is to decode the information and then se
Hi !
I'd like to know if it's possible on GNU Radio Manual and C++ API Reference
web page to see the code inside a function ? I'm looking for init_rs_char
code to better understand how it works and the only thing i'm able to find
is it's declaration on the web page.
Thank you
yload].
> Just write your preamble to the output buffer and then continue with the
> input.
>
> Besides, I'd recommend using constants instead of a define for TAB_SIZE.
>
> Cheers
> Johannes
>
>
> On 28.06.2016 18:27, Olivier Goyette wrote:
>
>> Hi everyone
Hi everyone,
I'm actually coding a SYNC block for my application. I need to append a 36
bits sync word to some data coming from a Reed Solomon encoder. What I did
is to initialize an array with my 36 bits sequence and then, plugging the
data in the rest of the array. The total length of my SYNC +
UPDATE
Even without any Costa loop or clock recovery, it works. It seems that the
trouble was only the TX amplitude.
2016-06-16 9:36 GMT-04:00 Olivier Goyette :
> YEH ! it works now.
>
> Only 2 major things to do :
>
> 1st - I multiplied the TX amplitude by 0.5 with a
ven 1Hz, play a bit around).
> Rx constellation: you can observe a frequency offset here.
> Rx time 2: my guess: it's the same as the other except for a scaling
> factor. Maybe a different radio channel, maybe because the other hardware
> behaves a bit differently.
>
> Cheers
ll in a
> single, monolithic block, you don't get access to the constellation. If you
> put a timing recovery block and a Costas loop block in front of the QT GUI
> sink, and set their parameters appropriately, you should be able to get a
> decent constellation plot.
>
AQ:
>
>
> http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#What-is-the-file-format-of-a-file_sink-How-can-I-read-files-produced-by-a-file-sink
>
> Best regards,
> Marcus
>
> On 06/15/2016 12:25 AM, Olivier Goyette wrote:
>
> This is non sense seriously. Thi
://www.dropbox.com/s/g38hgrtc7s6exyt/ones.png?dl=0
When I interleave both ones and zeros '1' & '0' , this is what I get :
https://www.dropbox.com/s/a1cfs0tebmywz0l/interleave.png?dl=0
What's wrong seriously ? If I can't even modulate properly, how am I
suppose
Hi
I have a problem. On my first setup, I use 2 file source. The 1st file
contains only '1' and the other only '0'. The 2 file sources go through a
selector and end up in a CPFSK mod block. When I run this, switching from
'1' to '0' makes the frequency drift from + to - FSK_deviation like it
shou
As promised, I'm giving the documentation I talked about yesterday and hop
it will clarify some of the things we discussed earlier.
https://www.dropbox.com/s/1blrausidm66tg4/DO-282B%20with%20Corrigendum%201_bx87er.pdf?dl=0
the password is bx87er
on page 23, you will find what the transmission sp
bol for CPFSK mod = 6
modulation index (k) = 0.6
center frequency = 978MHz
delta F for CPFSK = +- 312.5 kHz
roll-off factor for the Root Raised Cosine filter = 0.5
data is encoded using Reed-Solomon
thank you
Olivier
2016-06-09 19:28 GMT-04:00 Marcus Müller :
> Hi Olivier!
>
> On 10.06.2016
your system is impossible, unless I'm missing something here.
>
> Best regards,
> Marcus
>
> On 09.06.2016 17:59, Olivier Goyette wrote:
>
> Sorry for the inconvenience,
> 1 - Yes I tried, BUT ! the only way I manage to make this works is by
> plugging the following
My flowgraph is based on what I've read throughout the different forums on
the internet because :
1- I'm a newbie to GRC and GNUradio in general
2- It's my first time trying to develop a telecomm application
3- I'm using a RRC filter because it's a requirement stated in the
documentation I have ab
Something else I observed :
https://www.dropbox.com/s/ztlyujesvjlwexy/Receiver2.png?dl=0 . The data
seems to be mixed with the carrier, am I right ? We see like an AM
modulation in the upper graph. Is there a way to eliminate the carrier's
presence ?
Thanks
Olivier
___
I think I might have something at my receiver, but I'm not sure how to deal
with it. If you take a look at this picture :
https://www.dropbox.com/s/sp1hrhl8qgj2xct/Receiver.png?dl=0 , we clearly
see 2 spikes centered at + 312.5kHz and - 312.5kHz. That's what I should
have. The upper graph is the ou
Hello dear community !
I'm actually trying to develop an application with GRC that does CPFSK
mod/demod but I haven't got some satisfying results yet and I hope you will
be able to get me back in the right way.
The flowgraph i've made (
https://www.dropbox.com/s/6vuyleerbwl3df2/UAT.png?dl=0) is b
Thanks everyone for your support !
___
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