跳频通信系统中同步技术的研究与仿真分析

发布时间：2018-02-04 15:58

本文关键词： 跳频通信同步技术 Simulink TOD 同步字头法并行搜索　出处：《杭州电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：跳频通信是一种扩频通信技术，因其具有较强的抗干扰能力、截获能力和保密能力，常被应用于军事通信领域中，，随着跳频技术的发展，在民用移动通信领域中也得到了广泛的应用。同步技术是跳频通信中最关键的技术之一，同步建立的快慢和同步系统的可靠性，直接影响跳频通信系统的性能，在跳频通信系统中要实现接收端与发送端的正常通信，就要求收发两端实现跳频同步。跳频通信同步技术一方面能够更好地保证友方间的通信，另一方面可以防止敌方的跟踪或捕获同步过程。因此，跳频通信中同步技术的研究有着重要的应用价值和意义。论文主要研究了跳频通信中常用的同步技术，在此基础上提出了新的跳频同步方法并进行建模分析。主要工作如下： 1、简要介绍了跳频通信系统，具体从跳频通信的基本原理、数学模型、技术特点、关键技术及同步概要等方面进行展开。 2、对跳频系统中的五种自同步法和基于TOD（Time of Day）信息的同步字头法做了简要介绍，提出了一种可以同时适用于慢速跳频与快速跳频的同步法——并行搜索TOD同步字头法。该方法中，接收端同步系统包含发送端同步跳频序列的所有可能状态，采用并行搜索的方法直接进入跟踪阶段，并根据跟踪结果选择与发送端相对应的跳频序列，从而打破传统同步方法先捕获后跟踪的同步模式。理论分析表明该方法同步时间短，同步概率高且虚警概率低。 3、利用Matlab中的simulink工具分别对基于TOD信息的同步字头法与并行搜索TOD同步字头法进行了模块化仿真并详细介绍了仿真模型中的重要模块。通过仿真结果的分析，验证了同步方法的可行性及有效性。 4、对本文进行了归纳总结，指出文章的不足之处，针对下个阶段的任务做了明确安排。
[Abstract]:Frequency hopping communication is a kind of spread spectrum communication technology. Because of its strong anti-jamming ability, interception ability and security ability, it is often used in the field of military communication, with the development of frequency hopping technology. Synchronization technology is one of the most important technologies in frequency-hopping communication. The speed of synchronization and the reliability of synchronization system directly affect the performance of frequency-hopping communication system. In order to realize the normal communication between the receiver and the transmitter, the frequency hopping synchronization is required in the FH communication system. On the one hand, the FH synchronization technology can better ensure the communication between the friends. On the other hand, it can prevent the enemy from tracking or capturing synchronization process. Therefore, the research of synchronization technology in frequency-hopping communication has important application value and significance. Based on the research of frequency hopping synchronization technology, a new method of frequency hopping synchronization is proposed and analyzed. The main work is as follows: 1. The frequency hopping communication system is briefly introduced, including the basic principle of frequency hopping communication, mathematical model, technical characteristics, key technology and synchronization summary. 2. The five self-synchronization methods and the synchronous prefix method based on TOD(Time of Day information are introduced briefly. In this paper, a synchronization method, which can be applied to both slow frequency hopping and fast frequency hopping, is proposed, which is a parallel searching TOD synchronous prefix method. The receiver synchronization system contains all the possible states of the synchronous frequency hopping sequence at the transmitter. The parallel search method is used to directly enter the tracking phase, and according to the tracking results, the frequency hopping sequence corresponding to the transmitter is selected. The theoretical analysis shows that the synchronization time is short, the synchronization probability is high and the false alarm probability is low. 3. Using the simulink tool in Matlab, the synchronous header method based on TOD information and the parallel search TOD synchronous header method are simulated in detail, and the simulation model is introduced in detail. To module. Through the analysis of simulation results. The feasibility and effectiveness of the synchronization method are verified. 4. This article is summarized, pointed out the shortcomings of the article, and made a clear arrangement for the next stage of the task.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN914.41

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