National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Communication link modeling
Škára, Michal ; Prokopec, Jan (referee) ; Maršálek, Roman (advisor)
This Master’s thesis subject is communication link modeling, what means exploring and subsequent connect of blocks QPSK modulator – raised cosine filter – quadrature modulator – nonlinear amplifier – quadrature demodulator – raised cosine filter – QPSK detector. All work proceeded in simulation world VisSim 6.0, manual of this software is opened in this thesis. Individual blocks are analyzed in this scheme including description and configuration. Main theme was exploring error rate of transmission in modulator imbalance, using nonlinear amplifier TWTA or in calculations in fixed and floating point. Theoretically is examined and practically implanted method of modulator imbalance compensation. Circuits with QPSK and 16QAM modulator were analyzed. Circuits are filled in with transparent tables and graphs. In the end of this thesis is applied to generating of source codes in C language by the help of upgrade C-Code, which can be useful in practical realization on DSP.
Communication link modeling
Škára, Michal ; Prokopec, Jan (referee) ; Maršálek, Roman (advisor)
This Master’s thesis subject is communication link modeling, what means exploring and subsequent connect of blocks QPSK modulator – raised cosine filter – quadrature modulator – nonlinear amplifier – quadrature demodulator – raised cosine filter – QPSK detector. All work proceeded in simulation world VisSim 6.0, manual of this software is opened in this thesis. Individual blocks are analyzed in this scheme including description and configuration. Main theme was exploring error rate of transmission in modulator imbalance, using nonlinear amplifier TWTA or in calculations in fixed and floating point. Theoretically is examined and practically implanted method of modulator imbalance compensation. Circuits with QPSK and 16QAM modulator were analyzed. Circuits are filled in with transparent tables and graphs. In the end of this thesis is applied to generating of source codes in C language by the help of upgrade C-Code, which can be useful in practical realization on DSP.

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