| 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
。 |
| 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 |
| DOI： |
|
| 基金项目: |
|
| A Frequency-hopping Self-synchronization Scheme Based on Partial Sequence Matching |
| DU Chuan-bao,QUAN Hou-de,ZHAO Huan,CUI Pei-zhang |
| () |
| Abstract: |
| For improving the performance of synchronization message concealment a
nd antireconnaissance in a communication system, a new self-synchronization sc
heme called partial sequence matching is proposed which works in FH(Frequency-ho
pping) status.In this scheme the
parallel receiver gets the featured sequence L transmitted with few branches, a
nd the L is matched with local hopping sequence, then the receiver and trans
mitter′s phase difference can be calculated for
adjusting this difference to make system synchronous.Through theoretical analys
is, the conditio
n for the uniqueness of the sequence L is determined,the function expression
between syst
em complexity and acquisition time is obtained, and finally the optimal number o
f this s
ystem branches is got. The results show that, this scheme makes system hold sync
hroniza
tion and late entry synchronization without any synchronization lead code and se
rvice frequency, and it owns a shorter acquisition time than sliding correlation
scheme, and a more simple structure than matched filter scheme. This scheme com
bines traditional scheme advantages, and conceals better during synchronization
process, so the system can not be easily found and interfered by enemy. |
| Key words: communication countermeasurement FH synchronization initial synchronization parallel receiver sequence matching acquisition time e
xpectation |
《电讯技术》编辑部 