摘要
在码分多址(CDMA)的多无人机扩频测控链路中,多址干扰(MAI)是多目标系统需考虑的重要因素。在此类系统中,针对抗多址干扰的要求,设计具有相应互相关性能的扩频码是首要任务。从多无人机对抗多址能力的需求入手,分析了码速率、用户个数以及码的互相关性能对抗多址干扰能力的影响,得出了Kasami码型互相关性较好、序列部分相关会降低互相关性能的结论。仿真结果验证了理论分析的正确性。
In Code Division Multiple Access(CDMA) multi-UAV TT&C spread spectrum link,Multiple Access Interference(MAI) is an important factor to be considered in multi-target system in which the first task is to design spread spectrum code with cross correlation according to the anti-MAI requirement.Starting with the requirement of UAV for anti-MAI capability,this paper analyzes the effect of such factor as spread spectrum rate,number of users, and cross correlation on anti-MAI performance,draws the conclusion that the Kasami code has good cross correlation and the sequence partial correlation can reduce the cross correlation performance.Simulation result verifies the theoretical analysis.
作者
饶俊
RAO Jun(Southwest China Institute of Electronic Technology,Chengdu 610036,China)
出处
《电讯技术》
北大核心
2018年第10期1183-1188,共6页
Telecommunication Engineering
关键词
多无人机测控
码分多址
扩频
多址干扰
互相关性
multi-UAV TT&C
code division multiple access(CDMA)
spread spectrum
multiple access interference(MAI)
cross correlation