Improving SINR via joint beam and power management for GEO and LEO spectrum-sharing satellite communication systems

• DOI: 10.23919/jcc.2022.07.003
• Publication Date: 2022-07-22T16:40:06Z
• Authors: Xiaojin Ding; Zhuangzhuang Ren; Huanbin Lu; Gengxin Zhang
• Keywords: Transmitter power output; Communications satellite; Signal-to-interference-plus-noise ratio

In this paper, we investigate a geosynchronous earth orbit (GEO) and low (LEO) coexisting satellite communication system. To decrease the interference imposed on GEO user caused by LEO satellites, propose joint beam-management power-allocation (JBMPA) scheme to maximize signal-to-interference plus noise ratio (SINR) at user, whilst maintaining ongoing wireless links spanning from satellites their corresponding users. Specifically, first analyze overlapping coverage among obtain LEO-satellite set in which beams impose user. Then, considering traffic of obtained set, design method turn off switch satellites. Finally, further deep Q-network (DQN) aided power allocation algorithm allocate transmit for whose are unable be managed. Numerical results show that comparing with traditional fixed beam (FBPA) scheme, proposed JBMPA can achieve higher SINR lower outage probability, guaranteeing transmissions