摘要
针对Ka波段多波束卫星系统在信号传播过程中受雨衰影响而导致的点波束下行功率分配与实际需求不相匹配的问题,提出了一种联合优化功率分配算法(JOPA)。该算法在考虑实际雨衰情况以及最小业务需求量的基础上建模,并采用拉格朗日对偶理论和次梯度法进行优化。仿真结果表明,JOPA在未造成资源浪费的同时,实现了总容量最大化和各点波束间功率分配的公平性。
Power allocation for the downlink spot beam caused by rain attenuation does not match the actual demand in Ka- band multi beam satellite system, a joint optimum power allocation algorithm （JOPA） is proposed. The algorithm is based on the actual rain attenuation and the minimum traffic demand, the Lagrange duality theory and the subgradient method are used to optimize the problem. The simulation results show that JOPA achieves the maximization of total capacity and the fairness of power allocation among different spot beams without the waste of resources.
作者
谭文彬
林基明
王波
TAN Wenbin;LIN Jiming;WANG Bo(Key Laboratory of Cognitive Radio and Information Processing of Ministry of Education, Guilin University of Electronic Technology, Guilin 541004, China;School of Information and Electronic Engineering, Wuzhou University, Wuzhou 543002, China)
出处
《桂林电子科技大学学报》
2017年第6期452-457,共6页
Journal of Guilin University of Electronic Technology
基金
认知无线电与信息处理教育部重点实验室主任基金(LD16112X)
广西无线宽带通信与信号处理重点实验室主任基金(PF16108X)
关键词
KA波段
多波束卫星
雨衰
功率分配
凸优化
Ka band
multi-beam satellite
rain attenuation~ power allocation
convex optimization
