一种基于局部序列匹配的跳频自同步方案  

A Frequency-hopping Self-synchronization Scheme Based on Partial Sequence Matching

作　　者：杜传报[1] 全厚德[1] 赵寰[1] 崔佩璋[1] 

机构地区：[1]军械工程学院光学与电子工程系,石家庄050003

出　　处：《电讯技术》2011年第10期60-66,共7页Telecommunication Engineering

摘　　要：为了提高通信系统的同步信息隐蔽性和系统抗侦察能力,提出了基于局部序列匹配的跳频自同步方案,该方案工作在跳频工作状态。本方案中,并行接收机使用很少的支路接收具有某种特征的发送序列L,将序列L与本地序列匹配,确定本地与发射端的跳频序列相位差,调整相位完成同步捕获。通过理论分析,确定了序列L唯一的条件,得到了系统复杂度和捕获时间之间的函数表达式,并给出了系统最优支路数。分析结果表明,该方案不需要同步引导码和勤务频率就可以完成系统的同步保持和迟入网同步,并且捕获速度和系统复杂度均介于滑动相关法和匹配滤波法之间。本方案结合了传统方案的优点,具有良好的隐蔽性,不易被敌方发现和干扰。For improving the performance of synchronization message concealment and anti- communication system, a new self- synchronization scheme called partial sequence matching is proposed which works in FH（Frequency- hopping） status. In this scheme the parallel receiver gets the featured sequence L transmitted with few branches, and the L is matched with local hopping sequence, then the receiver and transmitter＇s phase difference can be calculated for adjusting this difference to make system synchronous. Through theoretical analysis, the condition for the uniqueness of the sequence L is determined, the function expression between system complexity and acquisition time is obtained, and finally the optimal number of this system branches is got. The results show that, this scheme makes system hold synchronization and late entry synchronization without any synchronization lead code and service frequency, and it owns a shorter acquisition time than sliding correlation scheme, and a more simple structure than matched filter scheme. This scheme combines traditional scheme advantages, and conceals better during synchronization process, so the system can not be easily found and interfered by enemy.

关 键 词：通信对抗 跳频同步 初始同步 并行接收机 序列匹配 捕获时间期望 

分 类 号：TN97[电子电信—信号与信息处理] TN914.41[电子电信—信息与通信工程]