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Cooperation within NEWCOM WPR3. POLITO-CHALMERS. Polito:Daniel Bustos Chalmers: Ali Behravan, Thomas Eriksson. Implementation of a communication link simulator with possibilities to simulate all kinds of communication signals using nonlinear amplifier models. - PowerPoint PPT Presentation
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Cooperation within NEWCOM WPR3
POLITO-CHALMERS
•Implementation of a communication link simulator with possibilities to simulate all kinds of communication signals using nonlinear amplifier models.
Polito:Daniel BustosChalmers: Ali Behravan, Thomas Eriksson
•Using the link simulator, we have made a comparison of various types of black-box amplifier models. This has resulted in a submitted conference paper.
Memoryless model Quasi-memoryless model Memory model 4.9 % 3.9 % 2.7%
% TOTAL_BITS: The total number of bits you want to simulate (information bits)TOTAL_BITS=1000000
% SNR: the SNR values (Eb over N0, in dB) that you wish to simulate% Either specify a single snr value (SNR=value) or a range (SNR=start:step:end)SNR=28:1:30
% FILENAME: Name of the file where results are storedFILENAME=so_10.it
% CODE_TYPE can be NONE, MFD (maximum free distance) or ODS (optimum distance spectrum).% CODE_INVERSE_RATE and CODE_CONSTRAINT_LENGTH pecifies rate and constraint length of the code. % For a code with rate 1/2, CODE_INVERSE_RATE should be 2 etc.CODE_TYPE=MFDCODE_INVERSE_RATE=2CODE_CONSTRAINT_LENGTH=7
% MODULATOR_TYPE can be BPSK, QPSK, PSK or QAM.% MODULATOR_SIZE can be 2 or 4 for PSK, 4, 16, 64 or 256 for QAM. Not used for BPSK or QPSK.MODULATOR_TYPE=QAMMODULATOR_SIZE=16
% number of carriers (OFDM_NSC) and cyclic prefix length (OFDM_NCP) in OFDM modulationOFDM_NSC=256OFDM_NCP=20% UPSAMPLE factor, bit per symbols, remember that in nonlinearity system fs > 2NB. N order ofUPSAMPLE=8
% NL_TYPE is the type of nonlinearity. % It can be LIM_HARD, LIM_SOFT, RAPP,POLY_3RD,MEMORY, LINEAR% NL_IBO is the input backoff in dBNL_TYPE=LIM_SOFTNL_IBO=10
BILKENT-CHALMERSBilkent: Hakan Arslan, Mustafa Durukal, Ezgi SafakChalmers: Ali Behravan, Thomas Eriksson
•It is of interest to study whether spectral regrowth (out-of-band distortion, distorting neighbor systems) or signal distortion (in-band distortion, distorting own system) is more problematic. By combining several link simulators at different frequency bands, we can combine the two effects into just one measure: bit error rate. This work is still under progress.
•A graphical user interface (GUI) for the link simulator was designed.
The linksimulator GUI
