一种主动子序列搜索的跳频同步捕获方法研究

刘策伦; 陈天杰

doi:10.19304/J.ISSN1000-7180.2021.0721

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一种主动子序列搜索的跳频同步捕获方法研究

网络与通讯 | 更新时间：2026-09-04

- 一种主动子序列搜索的跳频同步捕获方法研究
- Research on frequency hopping synchronization acquisition scheme based on active subsequence searching
- 微电子学与计算机 2022年39卷第3期页码：58-64
- 作者机构：
  
  北京理工大学信息与电子学院,北京,100081
- 作者简介：
- 基金信息：
  
  国家自然科学基金联合基金项目 U1836201
- DOI：10.19304/J.ISSN1000-7180.2021.0721
  中图分类号：
- 纸质出版：2022
- 稿件说明：
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刘策伦, 陈天杰. 一种主动子序列搜索的跳频同步捕获方法研究[J]. 微电子学与计算机, 2022, 39(3): 58-64.

LIU Celun, CHEN Tianjie. Research on frequency hopping synchronization acquisition scheme based on active subsequence searching[J]. 2022, 39(3): 58-64.
刘策伦, 陈天杰. 一种主动子序列搜索的跳频同步捕获方法研究[J]. 微电子学与计算机, 2022, 39(3): 58-64. DOI： 10.19304/J.ISSN1000-7180.2021.0721.

LIU Celun, CHEN Tianjie. Research on frequency hopping synchronization acquisition scheme based on active subsequence searching[J]. 2022, 39(3): 58-64. DOI： 10.19304/J.ISSN1000-7180.2021.0721.

摘要

传统的跳频同步捕获方法中，串行捕获方法捕获时间较长，并行捕获方法系统复杂度高，而使用同步引导码又容易受到干扰.为了解决这些问题，学界提出了一种基于子序列搜索，以跳频序列本身来表征时间信息的捕获策略.该策略的一种实现是基于序列部分频点匹配的同步捕获方案，使用类似并行捕获方法的系统结构，通过多支路检波的方法，得到跳频序列的一个短的子序列，并在接收端本地的跳频序列中进行搜索匹配，进而得到当前接收的信号的在跳频序列中的位置.本文对该策略的实现进行了研究，对子序列的获取这一关键步骤进行优化，主动而非被动地改变接收机各个支路用于检波的频率，增大了检波成功的概率，加快了获得子序列的速度；同时，使用多路并行的方案同时进行同步确认和数字检波，加快了捕获失败后开始下一次捕获的速度。理论分析和仿真结果显示，优化方案在捕获概率上，相对基于序列部分频点匹配的方案有了较大提升；在同等性能前提下的系统复杂度上，相对传统的并行捕获方法和基于序列部分频点匹配的方案有了明显的降低.

Abstract

Among the traditional frequency hopping synchronization acquisition methods

the serial acquisition method takes a long time to acquire

and the parallel acquisition method has a high system complexity

and the use of the synchronization pilot code is susceptible to interference. In order to solve these problems

an acquisition strategy based on subsequence search is proposed to represent the time information by frequency hopping sequence itself.An implementation of this strategy is a synchronous acquisition scheme based on partial frequency point matching of the sequence. The scheme uses a system structure similar to the parallel acquisition method. Through the multi-branch detection method

a short subsequence of the frequency hopping sequence is obtained. The subsequence is searched and matched in the local frequency hopping sequence of the receiving end

and then the position of the currently received signal in the sequence is obtained. This paper studies the strategy and optimizes the frequency point search strategy in the acquisition process: actively instead of passively changes the frequency group used by the receiver for detection. This increases the probability of detection success and speeds up the subsequences obtaining. Meanwhile

a multi-channel parallel scheme is used for simultaneous synchronization confirmation and digital detection

which accelerates the next capture after the current capture fails. Theoretical analysis and simulation results show that the acquisition probability has been greatly improved compared to the scheme based on sequence partial frequency matching.On the premise of the same performance

the system complexity is significantly reducedcompared to traditional parallel acquisition method and the scheme based on sequence partial frequency matching.

关键词

Keywords

references

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