Performance evaluation of DVB-S2X satellite transmission according to sharp roll off factors

摘要

Frequency usage is steadily increased according to growth in communication services. Researchers develop communication technologies to get an additive spectrum efficiency on this account. ETSI also upgrades existing DVB-S2 standard to meet increased frequency usage. The new standard, DVB-S2X, offers sharp roll off factor values to gain spectrum efficiency in satellite communication systems. In this paper, we experiment IF loopback and satellite tests to check validity of DVB-S2X roll off factors. Those tests used by the geostationary Cheonrian satellite. The test results show that 5% roll off factor offers about 14% spectrum efficiency gain, though threshold Es/No has loss of values about 0.3dB than 20% roll off factor value. We conclude that low roll off factor values in the DVB-S2X is effective in the real satellite communication environment.