北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (9): 1615-1623.doi: 10.13700/j.bh.1001-5965.2014.0681

• 论文 • 上一篇    下一篇

星群协同阵列传输容量

肖振宇1, 李瑶2, 白文杰1, 白琳1   

  1. 1. 北京航空航天大学 电子信息工程学院, 北京 100191;
    2. 北京航空航天大学 高等工程学院, 北京 100191
  • 收稿日期:2014-11-04 出版日期:2015-09-20 发布日期:2015-09-29
  • 通讯作者: 白琳(1982—),男,北京人,副教授,L.Bai@buaa.edu.cn,主要研究方向为空天通信网络及地面无线通信. E-mail:L.Bai@buaa.edu.cn
  • 作者简介:肖振宇(1983—),男,湖北天门人,讲师,xiaozy06@gmail.com
  • 基金资助:
    国家自然科学基金(61201189,91338106,61231011,61231013); 中央高校基本科研业务费专项资金(YWF-14-DZXY-007,YWF-14-RSC-006,YWF-14-DZXY-020)

Channel capacity of cooperative grouped satellites with array based transmission

XIAO Zhenyu1, LI Yao2, BAI Wenjie1, BAI Lin1   

  1. 1. School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
    2. School of Advanced Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2014-11-04 Online:2015-09-20 Published:2015-09-29

摘要: 为进一步提升星群协同的系统容量,考虑在卫星星群上配置阵列天线的传输模式.分析了最大化容量时下行链路的信道条件,给出了系统容量最大化的实现方式,探索了系统参数对信道容量的影响,发现信道容量随地面天线间距成周期性变化,其周期与卫星数目成反比、与地面天线阵列相对于东西方向的夹角的余弦成反比、与相邻卫星之间的角间距成反比.在多卫星多天线环境下,发现信道容量曲线的包络同样随地面天线间距成周期性变化,提出并通过仿真验证了多卫星多天线环境下减小地面天线间距和降低测控精确度要求的地面天线排布方案.

关键词: 阵列天线, 星群协同, 信道容量, 多入多出, 卫星信道模型

Abstract: In order to improve the system capacity of cooperative grouped satellites, we considered the transmission mode of equipping the satellites with antenna arrays. Channel condition of downlink with maximum channel capacity was analyzed. Implementation approaches to the maximum channel capacity were put forward. Influences of system parameters to the channel capacity were researched. The results show that the channel capacity changes with the ground antenna distance periodically. The changing cycle of the channel capacity curve is in inverse proportion to the number of satellites (sat-number), to the cosine value of the angle between the ground array and an east-west line and to the angular distance between satellites (sat-angular-distance). The envelope of the channel capacity curve changes with the ground antenna distance periodically as well in a multi-satellites multi-antennas environment. An arrangement strategy of ground antennas in a multi-satellites multi-antennas environment was proposed to decrease the ground antenna distance and to lower the requirement of the ground array measurement accuracy as well, which was verified by the simulation results.

Key words: antenna arrays, cooperative grouped satellites, channel capacity, multiple-input multiple-output, satellite channel model

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发