Power Allocation Optimization of Multibeam High-Throughput Satellite Communication Systems

The increasing demands in terms of high data rate and quality of services over the hybrid satellite-terrestrial relay networks (HSTRN) have pushed for the development of millimeter-wave (mmWave) band high-throughput satellites (HTS) with multibeams. The next generation of mmWave multibeam HTS communication systems (HTSCS) is viewed as the backbone network to enhance the throughput of the HSTRN. The article first investigates the basic backbone topology architecture of HTSCS, and an M-state Markov channel for the Ka/Q/V band mmWave systems is reviewed. Then, we propose a long-term optimal power allocation scheme over two in-dependent and identical spot beams based on the partially observable Markov decision process (POMDP), which can partly mitigate the negative effects of severe weather conditions. The key conditions for selecting the optimal power allocation action in the multibeam HTSCS are given. Simulation results show that our POMDP-based power allocation scheme can enhance the long-term throughput of the HTSCS.