高空平台与地面协同广播中的无线资源配置  

Radio resource management in integrated terrestrial HAP MBMS systems

作　　者：段海宁 张彧[1] 宋健[1] DUAN Haining;ZHANG Yu;SONG Jian(Digital Television Research and Development Center,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学电子工程系,数字电视技术研究中心,北京100084

出　　处：《清华大学学报（自然科学版）》2020年第4期306-311,共6页Journal of Tsinghua University(Science and Technology)

基　　金：国家电网公司“基于高空平台(HAPS)的临近空间通信技术研究”项目(WBS编号:52110417001A)。

摘　　要：高空平台通信系统覆盖范围广、组网成本低、通信容量大,适合为地面用户提供可靠的多媒体广播多播业务。该文针对高空平台与地面系统协同广播的场景,提出了一种兼顾能效与谱效的下行多址接入和资源分配优化算法。根据活跃用户的位置分布,首先以提高发射能效为目标为每个业务选择合适的信道资源,然后根据同类信道内不同业务的服务质量要求,采用联合正交与非正交多址接入的混合下行多址接入策略,以实现频谱效率和接收端复杂度的折中。仿真结果表明:相比传统的正交多址接入和单一信道传输算法,该算法在复杂度损失较小的情况下显著节约了发射成本,且具有更高的资源配置灵活性。Highaltitude platform(HAP) communication systems provide wide coverage, low networking costs, and large capacities for reliable multimedia broadcast/multicast services(MBMS) for terrestrial users. This paper presents an algorithm that jointly optimizes the downlink multiple access and the resource allocation for cooperative broadcasting using an integral HAP/terrestrial system which takes into account both the energy and spectrum efficiencies. The location distribution of active users is used to select the appropriate channel resources for each service that minimizes the energy use. Then, a hybrid orthogonal and non-orthogonal multiple access system is designed to satisfy the quality of service requirements for each service in the same channel to balance the spectral efficiency and the receiver complexity. Simulations verify that this algorithm is more efficient than the traditional orthogonal multiple access(OMA) strategy and single channel transmission algorithms. This algorithm has less complexity loss, significantly reduces transmission costs and provides more flexible radio resource management.

关 键 词：无线广播 高空平台 协同通信 多址接入 资源分配 

分 类 号：TN934.3[电子电信—信号与信息处理]