BER calculation - GMSK Demod

Hello, I am simulating a simple GMSK modulation/demodulation process, without any channel model, in order to evaluate the BER under normal conditions and with noise. I would like to have your opinion about the way I calculate the BER: is it correct? Is there a better way to do it? Here a brief

Re: Phase plot

m to Vector" -> "FFT" -> "Complex to Mag Phase (vec > len = fft size)" ->" QT GUI Vector Sink" (I think this is not what you were > looking for, but maybe I misunderstood your application, so I am explaining > this anyway). > > Regards, > Kyeo

Phase plot

Hi all, I'm facing some difficulties while trying to get a phase plot of a signal. More specifically, I'm trying to get the phase difference between two signals. Since my signals are complex in the time domain (GMSK), I've tried to use the "Complex to Arg" and eventually the "Complex to Mag

Control of running time

Hi all, Is there a way of precisely controlling the simulation/running time of GNU Radio, i.e. initial and final time instants? Thanks. Regards, Artur

Re: Control of running time

Thanks Michael and Marcus! Regards Artur Em sex., 3 de abr. de 2020 às 16:01, Marcus D. Leech < patchvonbr...@gmail.com> escreveu: > On 04/03/2020 02:43 PM, Artur Nogueira wrote: > > Hi all, > > > > Is there a way of precisely controlling the simulation/running

Re: Exporting 2d arrays

, > Marcus > > > ¹ ... nobody expects the Spanish Inquisition, just to quote Monty Python. > On 24/04/2020 23.20, Artur Nogueira wrote: > > Hi Marcus, > > > > By "variable", it means "the size is set by the user once and doesn't > change > &

Hidden e-mail address

Hello all, I was recently looking for some specific topics on https://lists.gnu.org/ and I realized that many e-mail addresses appear like address@hidden there. How do I do to get my e-mail address hidden in the same way? Best regards, Artur

Output variables - Python Block

Hi all, Is it possible to make the 'work' function from the Python Block to export an arbitrary number of variables, with different associated types? E.g. 3 output variables, 1 being complex64 and the other 2 being float32. Best regards, Artur

Re: Output variables - Python Block

loat32, np.float32] > > On 22/04/2020 04:09, Artur Nogueira wrote: > > Hi all, > > > > Is it possible to make the 'work' function from the Python Block to > > export an arbitrary number of variables, with different associated > > types? E.g. 3 output variable

Exporting 2d arrays

Hi all, I'm using the Python Block for signal processing and I need to export a matrix for further Fourier analysis. I think I can 'slice' this matrix into several lines (or columns) and store each of them in an 1-d output_items[i][:] variable, i=1,2...,number of lines (or columns). But

Re: Hidden e-mail address

gt; https://lists.gnu.org/archive/html/discuss-gnuradio/2020-04/msg00188.html > > or am I misinterpreting this? > > On 29.04.20 04:06, Artur Nogueira wrote: > > Hello all, > > > > I was recently looking for some specific topics > > on https://lists.gnu.org/ and I realiz

Problem with hidden addresses

Dear GNU Radio webmasters, I am a GNU Radio user, currently subscribed on the discussion list. While trying to find some specific topics on the website, I realized that inside a given discussion history (e.g.

Re: [gnu.org #1520212] Problem with hidden addresses

Dear Ms. Thérèse and Mr. Ian Kelling, Thank you very much for the clarifications. Best regards, Artur Em qui., 30 de abr. de 2020 às 09:58, Ian Kelling via RT escreveu: > On Wed Apr 29 15:54:58 2020, artur.no...@gmail.com wrote: > > Dear GNU Radio webmasters, > > > > I am a GNU Radio user,

Re: Exporting 2d arrays

ream of identical items_ or is > it rather a block that produces _messages of different content_? > > Best regards, > Marcus > > On 23/04/2020 17.43, Artur Nogueira wrote: > > Hi all, > > > > I'm using the Python Block for signal processing and I need to export

Re: Hidden e-mail address

is not done for > presenting the results of the search query. > > Either a bug in mailman or in the GNU lists configuration. Worth > reporting, will you do that? (the correct mail address should be at the > bottom of the page)' > > Cheers > Andrej > > On Wed, 29 Apr 2

GMSK bandwidth

Hello guys, I'm trying to generate a GMSK signal in accordance to the GSM specifications. To do so, I've been trying with both "GMSK Mod" and "GMSK Modulator" blocks, the last one with the following parameters: [image: image.png] To set these parameters, I considered (i) a sufficiently high

Re: Osmocom Source (frequency deviation)

and the frequency difference is a few kHz, then > that is just oscillator differences. > > On Wed, Jun 24, 2020 at 3:12 PM Artur Nogueira > wrote: > >> Hi everyone, >> >> I'm comparing the spectra of a pair of transmitted/received GMSK signals >> (carrier frequen

Osmocom Source (frequency deviation)

Hi everyone, I'm comparing the spectra of a pair of transmitted/received GMSK signals (carrier frequency = 923 MHz). As expected, there is a certain channel attenuation. Nevertheless, there is this frequency deviation at the Osmocom Source output: [image: image.png] I suppose this is something

Re: Osmocom Source (frequency deviation)

> On Wed, Jun 24, 2020 at 4:10 PM Artur Nogueira > wrote: > >> Hi Jeff, >> >> Thanks for the feedback. >> I'm using GNU Radio Version 3.7.13.5 and two Great Scott Gadgets HackRF >> units for the transmission/reception. >> My workflow looks like this: &

Re: Osmocom Source (frequency deviation)

ignal, that could be a lot of offset, >> and you might need a PLL to do frequency correction. That's 130 ppm, which >> is a little more than you should see between two HackRFs. >> >> On Wed, Jun 24, 2020 at 5:13 PM Artur Nogueira >> wrote: >> >>> Thanks a lot.

Re: Osmocom Source (frequency deviation)

Just one more comment: there is an additional low-pass filter when I use the mixer. The goal is to eliminate one of the frequencies resulting from this process (i.e. 2 x f_offset). Em qui., 25 de jun. de 2020 às 10:35, Artur Nogueira escreveu: > Yes, you're right: 2000 samples is too much

Re: Byte Boundary alignment

Hello Lannan, As far as I could understand, you want to do the following operations: (i) Generate bytes -> (ii) Modulate -> (iii) Transmit -> (iv) Receive -> (v) Demodulate -> (vi) Recover bytes and then you want to align the byte sequences from steps (i) and (vi). Am I correct? What hardware

Intermittent reception

Hello all, I'm analysing a pair of GMSK transmitted and received waveforms coming from this process: [image: image.png] The transmitted data is a periodic sequence of 5 bits (11100) - File Source "Repeat" option enabled. While trying to synchronize the signals so I can get the BER, I found this: