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GNU RADIO
hdi jj di
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mehdi sajjadi Summer 2009
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WHAT IS GNU RADIO?
An open-source software toolkit Design & Implementation of Radio systems
Two main set of tools:
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W HAT IS GNU R ADIO ? An open-source software toolkit Design & - - PowerPoint PPT Presentation
W HAT IS GNU R ADIO ? An open-source software toolkit Design & - - PowerPoint PPT Presentation
GNU R ADIO mehdi sajjadi hdi jj di 1 1 Summer 2009 W HAT IS GNU R ADIO ? An open-source software toolkit Design & Implementation of Radio systems Two main set of tools: 2 W HAT IS GNU R ADIO ? Radio system designer Signal
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WHAT IS GNU RADIO?
Radio system designer
Signal Processing Blocks Data Stream
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HISTORY:
SpectrumWare Project in MIT Pspectra Code
- ne of the first toolkits available to design basic software
- ne of the first toolkits available to design basic software
radio applications.
GNU Radio Started in 1998 by Eric Blossom In 2004 a complete rewrite of the GNU Radio was In 2004 a complete rewrite of the GNU Radio was
completed
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PROGRAMMING LANGUAGES:
- Simple , Powerful
S i ti l
Scripting language Implementation of a flow graph
is easy is easy
Mainly used for :
Defining , Managing flow graphs GUI
C++ Performance Critic applications Signal Processing Blocks
In fact C++ classes
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In fact C++ classes
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SWIG ( SIMPLIFIED WRAPPER AND ( INTERFACE GENERATOR ):
SWIG connects programs written in C and C++
with scripting languages ( Python in our case )
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HARDWARE:
In the beginning, combination of: Cable TV Modem ( RF FE )
20 MS l / ADC
20 MSample/s ADC USRP ( Universal Software Radio Peripheral ):
Designed by Matt Ettus
Designed by Matt Ettus 4 × ADC : 12 bits & 64 MSample/s 4 × DAC : 14 bits & 128 MSample/s
4 × DAC : 14 bits & 128 MSample/s
FPGA : Altera EP1C12 ( open-source code ) USB 2.0 4 × Daughter Boards DC to 2.9 GHz
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HARDWARE:
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HARDWARE:
USRP2 ( September 2008 ) : More powerful FPGA ( Xilinx Spartan 3-2000 ) 2 × ADC : 14 bits & 100 MSample/s
2 × DAC : 16 bits & 400 MSample/s
2 × DAC : 16 bits & 400 MSample/s Gigabit Ethernet interface
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DSP BLOCKS LIBRARY:
Extensive Library ( 200+ ) of DSP Blocks (C++) New blocks can be added Other libraries can be integrated GSL , FFTW, NumPy ,… Each Block: Number of inputs/outputs
T f i t/ t t
Type of input/outputs
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DSP BLOCKS LIBRARY:
Signal Sources Filters Mathematics Signal Modulation Inofmation coding and Signal processing blocks decoding Fourier Transform Wavelet transform OFDM Block OFDM Blocks Equalization
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Synchronization
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DSP BLOCKS LIBRARY:
Modulation: AM
FM ( NBFM WFN )
FM ( NBFM , WFN ) SSB PSK DBPSK DQPSK D8PSK PSK , DBPSK , DQPSK ,D8PSK QAM ( 8 , 16 , 64 , 256 ) CPM , CPFSK , GMSK
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FSK OFDM Error correction codes: Viterbi , Reed-Solomon , Turbo codes
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Various channel model/impairment simulation
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GUI ( GRAPHIC USER INTERFACE ) :
WXGUI : Based on wxPython
Oscilloscope
Oscilloscope Histogram FFT Sink Waterfall Constellation
QtGUI QtGUI Based on Qt
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GRC ( GNU RADIO COMPANION ) :
A graphical tool for creating signal flow graphs
and generating flow-graph source code ( like simulink ) simulink )
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WHAT IS THE NEXT:
Current GNU Radio Architecture: “PHY Layer”
C ti t f d t
Continuous stream of data Higher layers Higher layers Packet data M-Blocks
M Blocks
Version 3 3 : Version 3.3 : Current architecture + Message passing architecture
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AND:
GNU Radio has a long way to become commercial Software is still under development
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OTHER PROJECTS:
DttSP OSSIE
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THANK YOU THANK YOU
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