Olivier,
the link you gave us does not work.
It says:
"
*That file isn’t here anymore *
Someone might’ve deleted the file or disabled the link
"
Achilleas
PS: I attach here a simple simulation grc file for you to "play" with.
If you are not clear about it there is no point going on with more
co
Hey Olivier,
I hoped you pulled that file back off quickly. By publicly posting the
file and password you violated the crap out of the license agreement to
RTCA and linked your name to the act.
Mark
*From*: Olivier Goyette
*Subject*: Re: [Discuss-gnuradio] CPFSK mod/demod + strange
Date: Thu, 9 Jun 2016 15:24:37 -0400
From: Olivier Goyette
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] CPFSK mod/demod + strange behavior
Message-ID:
Content-Type: text/plain; charset="utf-8"
My flowgraph is based on what I've read throughout the differe
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
Olivier,
can you point EXACTLY at the reference (page no, etc so we don't have to
search)
where it requires an RRC after the CPFSK and an RRC at the input of the
receiver.
Achilleas
On Thu, Jun 9, 2016 at 3:04 PM, Achilleas Anastasopoulos
wrote:
> Why are you using the RRC filters?
>
> I hope
Marcus,
any PAM signal with symbol rate R can be transmitted using bandwidth R/2
(essentially a sinc pulse; this is the case when you put 0 as the
roll-off factor of an RRC).
I thought your comment was not specifically for CPFSK,
but general transmission schemes thus my clarification.
If it is
Hi Olivier,
On 10.06.2016 03:06, Olivier Goyette wrote:
> Excuse me for not understanding everything, but there seem to be a
> lack of comprehension coming from me.
>
> 1- Where is your "625 kHz" coming from ?
2x312.5kHz, your FSK deviation, and what looks like to be about your
filter bandwidth!
>
Excuse me for not understanding everything, but there seem to be a lack of
comprehension coming from me.
1- Where is your "625 kHz" coming from ?
2- The links I provided are only the reference where I took the information
for trying to build things up. I didn't include the link where it specifies
Hi Olivier!
On 10.06.2016 00:05, Olivier Goyette wrote:
>
> You are wrong !
>
That being the case very often, I think the error's on your side, this
time :)
So, I will need you to *explain* how you can transport 1.somethingMb/s
through a 625kHz wide channel if every time you use that channel to
tr
You are wrong !
1 sample/symbol is when I run simulation (no transmission over the air).
When I want to transmit over the air ( cable between Tx and Rx ) I need to
use 6 samples/symbol.
This is what I've told earlier, 1 sps is the only way I could send a
message and retrieve it at the end of the
Re: 1) Well, if this doesn't work on a stream with sps>1, it's no use
trying it over the air. You just get additional problems!
Also, I kind of doubt you should use the term FSK for something that is
only one sample long – a single sample doesn't have a frequency, right?
Re: 3) wait!
You have a bi
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
Why are you using the RRC filters?
I hope you are realizing that filtering a CPFSK signal is not the same as
filtering its instantaneous frequency (which is a PAM signal with
rectangular pulses).
As a result, the next question is why in your poly-phase filter you are
using RRC filter taps?
Achill
Hi Olivier,
trying to catch up with you here. I've got a few questions! Please
excuse if they've been answered by you before; it's not really easy to
navigate your emails – hint: it gets easier for us to help you if you
use the "reply" button in your email client, so that things get clearly
sorted
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
On 08. 06. 2016 14:59, Olivier Goyette wrote:
> 1st concern : when I enable the rational resampler with
> Interpolation set to : baud_rate and Decimation set to : sample_rate,
> GRC seems to not execute the flowgraph at all as if the calculations
> were too big ?! Since *sample_rate* / *baud_rate*
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
On Wed, Feb 15, 2012 at 5:14 AM, anju babu wrote:
> hi all,
>
> I'm using gnuradio companion to perform fsk modulation using
> CPFSK block .in that we don't have an option to set the carrier
> frequency.so can anyone please tell me how can we set the carrrier
> frequency.I'm not using
hi all,
I'm using gnuradio companion to perform fsk modulation using CPFSK
block .in that we don't have an option to set the carrier frequency.so
can anyone please tell me how can we set the carrrier frequency.I'm not
using USRP.Also how can we perform FSk demodulation in GRC
Thanks
The CPFSK block expects digitally encoded data as bits. The file sink
will give you raw demodulated samples. You need to determine what format
your handheld radio expects to see before you can re-encode your saved
data appropriately. FSK describes a digital modulation scheme but says
nothing about
Hello all,
I am having the following trouble with data types:
I have the following flowgraph working to record FM broadcasts:
{USRP2 source -> LPF -> FM Demod -> File Sink}
Next, I am making another program to transmit the stored FM broadcast audio to
my handheld radio which expects FSK modula
Hello,
I'm a newcomer to the whole world of SDR and actually radio in general. For
the past few days I've been reading through messages posted here and the
source code behind gnuradio, but I haven't been able to find exactly what
I'm looking for.
Right now, I am simply trying to CPFSK modulate an
On Mar 8, 2007, at 11:31 PM, Andrew Buck wrote:
Hi,
I'm trying to demodulate and decode a CPFSK signal generated by a
non-gnuradio source. I'm new to gnuradio and RF in general. I know
that GMSK is a form of CPFSK, so I started by trying that, but I
haven't
had success. I noticed that the
Hi,
I'm trying to demodulate and decode a CPFSK signal generated by a
non-gnuradio source. I'm new to gnuradio and RF in general. I know
that GMSK is a form of CPFSK, so I started by trying that, but I haven't
had success. I noticed that the gmsk code is in the limbo directory, so
I'm not sure
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