摘要
研究了软扩频码的最优筛选方法和多网分配方法,以提高Link 16数据链系统的组网能力。本方法首先根据循环移位键控码的结构特征设置搜索码空间的限定条件,生成满足均衡性和自相关性要求的码库;之后采用起点遍历、初段随机、末段有向的三段式搜索方法,由自相关码库中进一步筛选出满足互相关要求的一组软扩频码;最后与跳频图案相结合,将软扩频码合理分配给数据链系统的各子网使用。与传统的随机搜索相比,所提出的优选方法计算量小,能够更加快速地搜索出满足指标要求的码字,从而有效地降低系统的网间干扰,支撑系统的多网工作能力。
This paper studies the optimal selection method of tamed spread spectrum code and multi-network allocation method to improve the networking capability of Link 16 data link system.Firstly,this method sets the limitations for searching code space according to the structural characteristics of cyclic shift keying code,generates a code library satisfying balance and auto-correlation requirements,then by using the searching method with three stages：ergodic from origin,random in early stage and directional in final stage,selects a set of tamed spread spectrum codes from the auto-correlation code library,which satisfy the cross-correlation requirements,finally the tamed spread spectrum codes are appropriately assigned to each subnet of data link system according to the frequency-hopping pattern.Compared to the traditional random searching methods,the proposed optimization method has lower computation cost and faster speed to select the codes satisfied for the index requirements,which can effectively reduce the inter-subnet interference and support multi-network capability of data link system.
作者
赵大伟
ZHAO Da wei(The 20th Research Institute of CETC,Xi＇an 710068,China)
出处
《舰船电子对抗》
2018年第3期84-87,91,共5页
Shipboard Electronic Countermeasure
关键词
数据链
扩频通信
循环移位键控码
跳频图案
data link
spread spectrum communication
cyclic shift keying code
frequency-hopping pattern
