Ka波段多波束卫星联合优化功率分配算法

摘要

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.%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.