针对信道化卫星通信系统的链路可靠性问题进行系统负载分析,综合考虑转发器非线性效应和卫星总功率受限的影响,对链路可靠性的指标构建一种最大化最小值优化模型,并提出了一种最大值回退搜索算法对该模型的子信道增益值进行求解,从而将非线性非凸的最大化最小值优化问题转化为一维搜索问题。仿真结果表明,与现有算法相比,所提算法在保持同等转发器功率利用效率的情况下,可以使系统的链路可靠性度量值增大1 倍以上,有效地提升了系统的链路可靠性。

This paper investigates the problem of link reliability of the channelized satellite communication systems. By taking the system loading analysis with considering the influence of transponder nonlinearity and the total power limit of the satellite, an optimization model of maximizing the minimum value is constructed for the link reliability metric of the system, and a maximum value back-off search algorithm is proposed to solve the subchannel gains of the model, which convert the non-linear non-convex maximization optimization problem into a one-dimensional search problem. The simulation results show that, in the case of maintaining the same power efficiency of the transponder, the proposed algorithm can increase the link reliability metric of the system more than 1-fold when compared with the existing algorithms, which effectively improves the link reliability of the system.

TN927

国家自然科学基金资助项目(61871398);国家自然科学基金资助重点项目(61931011);江苏省自然科学基金资助杰出青年项目(BK20190030);江苏省自然科学基金资助项目(BK20191328)