摘要
分析了平流层通信平台在其几何覆盖区域内的链路损耗,证明了平台在其几何最大覆盖范围内通信的可行性.重点分析了应用MIMO技术的平流层通信系统的容量.将单个HAP覆盖区域分为视距传输的内环和散射衰落的外环,采用4种方式构成MIMO多天线阵列,分别仿真了内环和外环在这4种MIMO天线阵下的容量.仿真结果表明,使用MIMO可使平流层通信系统容量大幅度提高.并且,在内环,采用多移动终端构成分布式MIMO阵列可获得最大容量.在外环,平台、移动终端均采用分布式MIMO阵列式可获得最大容量,考虑平台造价因素,可简单地采用一般型的MIMO阵列.
The link loss in the geometrical HAPS coverage area is analyzed to prove the feasibility of communication in this maximum geometrical coverage area. A full-scale outdoor MIMO model is employed to analyze the capacity of MIMO HAPS system. A single HAP coverage is divided into LOS inner circle and NLOS scattering fading outer circle. In each coverage area, the capacity is simulated respectively under four kinds of MIMO multi-antennas construction schemes. The simulation results show MIMO is valuable in improving the capacity of HAPS system. In inner circle, distributed MIMO array constructed by multi-MS can obtain the highest capacity. While in outer circle, distributed MIMO array constructed by multi-platform and multi -MS can gain highest capacity. If the expense of the platform is cared for, the typical MIMO array can be chosen.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2007年第7期1146-1150,共5页
Journal of Harbin Institute of Technology
基金
国家高技术研究发展计划资助项目(2005AA123940)
国家自然科学基金资助项目(60372076)
