Abstract
ABSTRACT In this paper, we propose an open loop power control algorithm to control transmission power of the On-The-Move(OTM) Satcom terminal in GEO satellite communication environment. The proposed algorithm identifies the current channel state restricted by an obstacle or an antenna depointing loss based on the received beacon signal strength. On the basis of the determined signal attenuation causes, the OTM Satcom terminal turns off the RF output when an antenna tracking is failed. If the OTM Satcom terminal experiences a channel blockage by an obstacle, the terminal spreads the transmit data to increase data reception probability. To evaluate the performance of the proposed algorithm, we compare an adjacent satellite interference level and an outage probability. The results show the performance of the proposed algorithm is better than that of the conventional algorithm. 키워드 : 위성통신, 이동형 위성단말, 전력제어, 위성통신채널, 대역확산 Key word : Satellite communications, OTM terminal, Power control, Satellite communication channel, Spread spectrumJournal of the Korea Institute of Information andCommunication Engineering
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