Downlink beamforming scheme for hybrid satellite-terrestrial networks

作者：Jiang, Yang-Wei; Ouyang, Jian^*; Yin, Chun-Yan; Xu, Zhao-Ye; Tao, Xiang-Shuai; Lou, Li

来源：IET Communications, 2018, 12(18): 2342-2346.

DOI：10.1049/iet-com.2018.5313

• iterative methods
• mean square error methods
• array signal processing
• optimisation
• satellite communication
• quality of service
• duality (mathematics)
• hybrid satellite-terrestrial network
• downlink transmission
• constrained optimisation problem
• transmit power budget
• uplink-downlink duality theory
• optimal BF weight vectors
• analytical downlink BF weight vectors
• downlink beamforming scheme
• minimal quality-of-service maximization
• base station
• interference constraint
• iterative algorithm

Here, the authors propose a beamforming (BF) scheme for the downlink transmission of a hybrid satellite-terrestrial network. The authors first formulate a constrained optimisation problem to maximise the minimal quality-of-service of the terrestrial users subject to the interference constraint of the satellite user and the transmit power budget of the base station (BS). Then, by using the uplink-downlink duality theory, the authors design an iterative algorithm to obtain the optimal BF weight vectors as well as the corresponding power coefficients of the considered system. Furthermore, the analytical downlink BF weight vectors are obtained through the equivalence between signal-to-leakage-and-noise ratio and minimum mean square error. Simulation results are provided to demonstrate the effectiveness of the proposed BF method.

• 出版日期2018-11-20
• 单位南京邮电大学