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在多波束卫星通信系统中,星上资源(功率、带宽和波束等)是有限的。为了满足多波束卫星通信系统中不同的业务需求,在考虑不同波束信道条件的基础上,提出一种具有波束选择的波束间功率带宽联合分配算法(FBPASS),采用拉格朗日对偶理论和次梯度法解决该功率带宽联合优化问题。仿真结果分析表明,与没有选择有效波束的功率带宽联合分配算法相比,该算法可以增加系统总容量,提高资源的利用率。
In multi-beam satellite communications systems, the on-board resources (power, bandwidth and beam, etc.) are limited. In order to meet the different business requirements of multi-beam satellite communication systems, a beam power selection algorithm based on beamforming is proposed based on the different beam channel conditions (FBPASS). Lagrange duality theory and second order Gradient method to solve the power bandwidth joint optimization problem. Simulation results show that this algorithm can increase the total system capacity and improve resource utilization compared with the joint allocation of power bandwidth without effective beam selection.