GNUradio rid

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GNUradio

…. Linux…. internet…. veel geduld

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GNUradio

GNUradio en windows…?niet onmogelijk, maar……

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GNUradio

FFT sinksample rate:base band freq:ref level:FFT size:refresh rate:……

FFT sinksample rate:base band freq:ref level:FFT size:refresh rate:……

GUI scope sinksample rate:trigger mode:…….

GUI scope sinksample rate:trigger mode:…….

Waterfall sinksample rate:base band freq:dynamic range:ref level:ref scale:FFT size:refresh rate:……

Waterfall sinksample rate:base band freq:dynamic range:ref level:ref scale:FFT size:refresh rate:……

Audio sinkAudio sink

File sinkFile sink

TX hardwareTX hardware

RX hardwareRTL-SDRUSRPHackRF….

RX hardwareRTL-SDRUSRPHackRF….

Audio sourceAudio source

File sourceFile source

Signal sourceSignal source

Noise sourceNoise source

hardware interfaces

instrumentation

sources sinks

DSP blocksFiltersConverters(De)modulators….

DSP blocksFiltersConverters(De)modulators….

bewerking

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GNUradio

MultipliersMultipliers sliderslider GPSGPS

GSMGSM

ADS-BADS-B

Bit slicerBit slicer

Audio sourceAudio source

File sourceFile source

Signal sourceSignal source

Noise sourceNoise source

berekeningen

AcarsAcars

AISAIS

PSKPSK

WiFiWiFi

RadarRadar

DecimatorsDecimators

MixersMixers

(De)modulators(De)modulators

----------

checkboxcheckbox

texttext

tabstabs

----------

------------

--------------

speciale routinesgebruiker interactie

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GNUradio

framework is geprogrameerd in Python: interpreted (managed) languagetime critical berekeningen in C++: machine language

Python script C++ programma

Run Time Compiler

executie

Compilerprogrammeren

run

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GNUradio

• input en output definiëren • voor elke DSP-stap geschikt blok selecteren• parameters per blok instellen• numeriek formaat (complex, float, integer, binary,…)• blokken voor instrumentatie en user interface• grafisch alle blokken verbinden

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GNUradio

interface naar hardware

RTL-SDR sourcesample rate:frequency:freq corr:DC offset:IQ balance:gain mode:RF gain:

RTL-SDR sourcesample rate:frequency:freq corr:DC offset:IQ balance:gain mode:RF gain:

frequency selection

Freq Xlat FIR filterdecimation:taps:center freq:sample rate:

Freq Xlat FIR filterdecimation:taps:center freq:sample rate:

demodulation

AM demodulationchannel rate:audio decimation:audio pass:audio stop:

AM demodulationchannel rate:audio decimation:audio pass:audio stop:

Play audio

Audio sinksample rate:Audio sinksample rate:

complex I/Q

Voorwaarden:• sample rate tussen 2 blokken moet hetzelfde zijn• data types tussen 2 blocks moet hetzelfde zijn: complex, float, integer, byte, …

data type conversion

float

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GNUradio

RTL-SDR sourcesample rate: 2.4Mfrequency: 102.7MRF gain:20


WBFM receivequadrature rate: 240kaudio decimation: 1


Audio sinksample rate: 48kAudio sinksample rate: 48k

Rational resamplerInterpolation: 1decimation: 5


Low pass filterdecimation: 10gain: 1sample rate: 2.4Mcut off freq: 100ktrans freq: 10k

Low pass filterdecimation: 10gain: 1sample rate: 2.4Mcut off freq: 100ktrans freq: 10kFFT sinkFFT sink

Low pass filterdecimation: 1gain: 1sample rate: 240kcut off freq: 15ktrans freq: 3k


MultiplyVolume:MultiplyVolume:

FM de-emphasisFM de-emphasis

FFT sinkFFT sink

FFT sinkFFT sink

FFT sinkFFT sink

RF frequentieRF gainRF frequentieRF gain IF bandbreedteIF bandbreedte

volumevolume

notebooknotebook

FM ontvanger (mono)

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GNUradio





Audio sinksample rate: 48kAudio sinksample rate: 48k



Low pass filterdecimation: 10gain: 1sample rate: 2.4Mcut off freq: 100ktrans freq: 10k

Low pass filterdecimation: 10gain: 1sample rate: 2.4Mcut off freq: 100ktrans freq: 10kFFT sinkFFT sink



MultiplyVolume:MultiplyVolume:

FM de-emphasisFM de-emphasis

FFT sinkFFT sink

FFT sinkFFT sink

FFT sinkFFT sink

RF frequentieRF gainRF frequentieRF gain IF bandbreedteIF bandbreedte

volumevolume

notebooknotebook

FM ontvanger (mono)

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GNUradio

GNUradio GUI WX-componenten

Slider Option buttons

[1 - rij] [4 – kolombreedte]

[2 - kolom]

[3 - rijhoogte]Grid positie

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GNUradio

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GNUradio

Instrumentatie en user interface:

spectrum display

Airband AM ontvanger

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GNUradio

Airband AM ontvanger

Instrumentatie en user interface:

waterfall display

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GNUradio

GNU-radio in de praktijk

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GNUradio

SSB transmitter• Audio (file): complex

reële amplitude waarden

complexe amplitude waarden toevoegen

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GNUradio

SSB transmitter• Audio (file): complex, shift audiospectrum

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GNUradio

SSB transmitter• Filter sideband, verschuif naar TX-frequentie

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GNUradio

FM-omroepband ontvanger met stereodecoder

Spectrum na FM demodulatie:

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GNUradio


Stappen:

• FM-demodulatie, L+R signal in band 0 – 15 kHz

• extractie van 19 kHz ‘pilot’-toon met PLL

• verdubbelen naar 38 kHz als carrier voor AM-demodulatie van L-R

• filteren van L-R band (23 – 53 kHz)

• AM demodulatie

• optellen en aftrekken van (L+R) en (L-R)

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GNUradio


Wideband FM demodulation

Filter

19 kHzX 2

Filter

38 +/- 15 kHz

Vermenig-vuldigen

AM demodulatie

optellenFilter

0 -15 kHz

aftrekken

links

rechts

L + R

L - R

L + RL – RRDS

Filter

0 -15 kHz

PLL

19 kHz

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GNUradio

GNUradio studiemateriaal:

• files.ettus.com/tutorials/labs/Lab_1-5.pdf

• gnuradio.org/redmine/projects/gnuradio/wiki/

• gnuradio.org/redmine/projects/gnuradio/wiki/GNURadioLiveDVD

• www.trondeau.com/

• www.ece.uvic.ca/~elec350/grc_doc/index.html#

• https://www.youtube.com/watch?v=og8RhGTFhfU• www.rtl-sdr.com/about-rtl-sdr/• https://greatscottgadgets.com/hackrf/

en nog veel meer……

https://greatscottgadgets.com/hackrf/

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GNUradio.org

Documents

GNUradio rid