SIMULATION OF DVBS2 TRANSMISSION IN （模拟DVBS2传播）.pdfVIP

SIMULATION OF DVB-S2 TRANSMISSION IN MATLAB Ondřej Kaller, Ladislav Polák, Tomáš Kratochvíl Department of Radio Electronics, Brno University of Technology Purkyňova 118, 612 00 BRNO Abstract This contribution is focused on simulation of the DVB-S2 (Digital Video Broadcasting – Satellite 2nd generation) digital television transmission. For this simulation an application in MATLAB has been developed. It can be use for simulation of whole processing in DVB-S2 transmitter including stream adaptation, FEC (Forward Error Correction) coding with interleaving, modulation, channel distortion and of course inverse operations in the receiver. We have designed very illustrative and robust GUI (Graphical User Interface), because we have taken into account utilization as a teaching aid for students in laboratory measurements. The paper also contains a comparison of measurement and simulation results of channel BER (Bit Error Ratio) and post FEC BER that depend on SNR (Signal-to-Noise ratio). These characteristics are investigated in case of various transmission parameters defined in the DVB-S2 standard. These could be modulation scheme or LDPC (Low Density Parity Check) code rate etc. We also compare simulated results of SNR with the ETSI standard when so called “cliff-off” effect is present. 1 DVB-S2 system introduction The DVB-S2 (Digital Video Broadcasting – Satellite 2nd generation) system has been developed as the improvement of first generation DVB-S (Digital Video Broadcasting – Satellite) system,