基于OCML构造序列的Link16扩频方法  

Link16 spread spectrum method based on OCML construction sequence

作　　者：罗海玲 宁晓燕[1] 郭凯丰 刁鸣[1] LUO Hailing;NING Xiaoyan;GUO Kaifeng;DIAO Ming(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China;China Shipbuilding System Engineering Research Institute,Beijing 100094,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]中国船舶工业系统工程研究院,北京100094

出　　处：《系统工程与电子技术》2022年第12期3837-3842,共6页Systems Engineering and Electronics

基　　金：中央高校基本科研业务费专项资金(3072021CF0809);先进船舶通信与信息技术工业和信息化部重点实验室(AMCIT2101-05);黑龙江省高精度卫星导航及海洋应用重点实验室开放基金(HKL-2021-Y02)资助课题。

摘　　要：Link16数据链因其强抗干扰性被广泛应用于各大信息化作战平台,但其传输速率和频带利用率并不高。针对这一问题,提出一种基于单向耦合映像格子(one-way coupled map lattice,OCML)模型时空混沌序列的缩短码移位键控(truncated code shift keying,TCSK)方法。系统以OCML模型下的混沌序列作为扩频基码,将每个承载信息的码片长度缩短为原来的1/P,并将每个码片进行镜像对称,获得一个总长度为2/P的扩频码片进行传输。相对于原循环码移位键控(cyclic code shift heying,CCSK)系统的扩频序列,该码片长度减少一半,从而提高系统的传输速率。OCML序列具有良好的伪随机性和自相关性,同时该模型下能生成大量扩频序列,各序列相互独立,一个信道可容纳多个扩频信号,极大地提高了频带利用率。对多径衰落信道下的误码性能进行了仿真,结果表明,所提方法能有效改善多径衰落下的系统性能。Link16 data chain is applied to major combat platforms with its strong anti-interference ability,but the transmission rate and utilization of Link16 are low.For this problem,a truncated code shift keying(TCSK)method based on one-way coupled map lattice(OCML)spatiotemporal chaotic sequence is proposed in this paper.The system uses spatiotemporal chaotic sequence under the OCML model as base code,then shortens the length of each chip which carries information to the original 1/P,and mirrors each chip symmetrically to obtain a spread spectrum chip with a total length of 2/P to transmit.Compared with the original sequence,the length of this chip reduces by half to improve the transmission rate of the system.OCML sequences have great pseudo randomness and autocorrelation,and many spread spectrum sequences can be generated under the model,each sequence is unique,so one channel can acommodate lots of spread spectrum signal,which improves the efficiency of bandwidth tremendously.The bit error rate(BER)performance in multipath channel model is simulated,and the simulation results show that the scheme can effectively improve performance of system under multipath fading.

关 键 词：LINK16数据链 单向耦合映像格子模型 缩短码移位键控 传输速率 多径衰落 

分 类 号：TN919.3[电子电信—通信与信息系统]