面向海域通信的空天地一体化网络功率分配方法

Power Allocation for Maritime Communication in Space-Air-Ground Integrated Networks

在空天地一体化海域通信网络中,岸基基站和系留无人机协同覆盖近海区域;卫星为岸基设施覆盖不到的远海区域提供通信服务。此时,网络拓扑不规则、电磁传播环境复杂,导致耦合干扰问题。为此,提出一种基于大尺度信道信息的功率分配方案,可在确保对远海卫星用户干扰约束的前提下,最大化岸基设施组成的虚拟小区的各态历经速率之和,并设计了两步迭代算法求解非凸问题。仿真结果证明了所提方案能够有效利用位置信息解耦网络中的同频干扰,提升空天地一体化海域网络的覆盖性能和资源效率。

In the space-air-ground integrated network,coastal base stations and tethered unmanned aerial vehicles collaborate to provide coverage in near-sea areas,while satlites serve the far-sea areas beyond coastal infrastructure coverage.However,the iregularity of the network topology and the complexity of the electromagnetic propagation environment introduce coupled interference,posing a significant challenge.To address this issue,we propose a power allocation scheme based on large-scale channel state information,aiming to maximize the sum ergodic rates within the virtual cells formed by coastal infrastructure,while subject to interference constraints for far sea satellite users.A two-step iterative algorithm is presented to solve the formulated non-convex problem.Simulation results validate the effectiveness of the proposed scheme,which efficiently exploits location information to decouple co-frequency interference in the network,thereby enhancing the coverage performance and resource utilization efficiency of the space air-ground integrated network.