摘要
针对深空通信的系统信息传输效率低,时延长的问题,文中设计一种空间信息网的Ka频段非正交多址接入中继系统,推导出中继卫星配备单天线情况下的中断概率和遍历系统容量等关键指标的解析表达式,提出的非正交多址接入中继系统在节约一半传输时间条件下,达到与正交多址接入系统相同遍历系统容量时所需的功率分配方案。通过仿真,验证了该方案的可行性。
To solve the problem of low system information transmission efficiency and prolongation of deep space communication,this paper designs a Ka-band Non-Orthogonal Multiple Access(NOMA)relay system for spatial information network,derives the analytical expression of key indicators such as interruption probability and traversal system capacity when the relay satellite is equipped with a single antenna,and proposes the power allocation scheme required for the NOMA relay system to achieve the same traversal system capacity as the orthogonal multiple access system under the condition of saving half the transmission time.Through simulation,the feasibility of the scheme is verified.
作者
王春华
王莹莹
王佳宁
白涛
孙洋
WANG Chun-hua;WANG Ying-ying;WANG Jia-ning;BAI Tao;SUN Yang(The 91411 Unit of PLA,Dalian 116041,Liaoning Province,China;College of Intelligent Systems Science and Engineering,Harbin Engineering University,Harbin 150001,China;Faculty of Mechatronic Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《信息技术》
2024年第11期167-172,共6页
Information Technology
关键词
非正交多址接入
地月通信
信道估计
信噪比
Non-Orthogonal Multi Access
Earth-moon communication
channel estimation
signal to noise radio
