Energy Efficient Joint Precoding for Multibeam Satellite Systems

Power and spectrum are considered as the significantly resource in the satellite communication systems, recently multiple-input multiple-output (MIMO) precoding has been identified as an excellent choice for the multibeam satellite communication systems (MSCSs). In order to improve power and spectrum utilization while mitigate the intra-beam interference and inter-beam interference, the crucial challenge is joint precoding design for multiple terminals. This paper proposes a hybrid full frequency (HFF) joint precoding scheme and chooses transmit power minimization as the energy efficient optimization problem which can be formulated as an indefinite quadratic optimization program. An optimization algorithm based on semidefinite programming (SDP) is designed to obtain the optimal objective. Simulation results demonstrate the performance improvement of proposed HFF joint precoding outperforms conventional frequency reuse and existing algorithms with respect to per feed power on-board constrained.