摘要
航空集群作战场景中电磁环境差且需传输业务量大,数据链频谱资源愈发紧张。针对上述问题,采用NOMA技术提升数据链频谱利用率并分析干扰条件下基于非正交多址接入(NOMA)技术的数据链系统性能。首先针对航空集群作战场景特点,建立了基于NOMA技术的航空数据链系统模型,推导了系统可获得最大速率表达式。其次考虑路径损耗与莱斯衰落的影响,推导出系统中断概率的闭合表达式,为估算系统性能提供了快速有效的方法。仿真结果验证了理论推导公式的准确性,并进一步分析了信号发射功率、传输距离、敌方干扰以及数据速率等因素对系统性能的影响。
The poor electromagnetic environment and the large amount of traffic to be transmitted in the aviation cluster combat scenario have led to an increasingly tight spectrum of data link resources.In response to the above problems,the NOMA technology is used to improve the data link spectrum utilization and analyze the performance of the data link system based on the NOMA technology under interference conditions.Firstly,an aviation data link system model based on NOMA technology was established based on the characteristics of the aviation cluster combat scenario,and the expression that the system can obtain the maximum rate was derived.Secondly,considering the effects of path loss and Rice fading,a closed expression for the probability of system outage is derived,which provides a fast and effective method for estimating system performance.Simulation results verify the accuracy of the theoretical derivation formula,and further analyze the effects of factors such as signal transmission power,transmission distance,enemy interference,and data rate on system performance.
作者
方宇
吕娜
陈坤
Fang Yu;LYU Na;Chen Kun(Institute of Information&Navigation,Air Force Engineering University,Xi’an,Shaanxi 710077,China)
出处
《信号处理》
CSCD
北大核心
2020年第7期1029-1037,共9页
Journal of Signal Processing
基金
国家自然科学基金(61703427)。
关键词
数据链
非正交多址接入
中断概率
莱斯衰落
路径损耗
data link
non-orthogonal multiple access
outage probability
Rice fading
path loss
