【作者】 李琳；

【导师】 张福洪；

【作者基本信息】 杭州电子科技大学 ， 电子与通信工程， 2014， 硕士

【摘要】 随着科技的迅速发展，电子战成为现代战争的核心。在激烈的电子战中掌握主动权，是交战双方的终极目标。在复杂的电磁环境中，为了成功躲避敌方的干扰，保护己方通信正常且高质量的进行，通信对抗显得尤为重要。跳频通信因其能够有效地对抗通信过程的干扰和衰落，它一出现就备受关注，尤其是在军事领域。跳频通信只有在同步的支撑下才能正常进行。只有收发两端严格同步，点对点跳变，接收端才能从发射端正确的接收并解调出数据信息。因此，如何在高速跳变的条件下实现跳频系统快速、准确的同步是当前跳频技术研究的热点，也是难点。本文以“XXXX系统”二期工程为背景，主要研究的是高速跳频系统下的信号的解跳及同步技术，给出了高速跳频系统的总体设计方案，并对该方案进行了Simulink的建模与仿真，完成了跳频系统的同步及跳频信号的正确解跳。同时提出了一种改进的同步方案-TOD自同步法，该同步方法是同步字头法和时间信息(TOD)的结合。并利用该方法设计了跳频系统的同步仿真模型，仿真结果验证了其有效性与可靠性。本文首先对跳频通信做了系统的介绍，具体从选题背景、跳频通信的研究状况，基本理论、技术优点以及关键技术5个方面进行展开。然后对关键技术中的同步技术做了重点的介绍，包括几种常用的跳频同步技术的详细理论与性能比较，之后提出了一种更适合于高速跳频系统的同步技术——TOD自同步法，并对该方法的同步原理、同步性能进行了理论性的介绍。其次，本文根据前面所介绍的跳频理论，给出了高速跳频系统的设计方案，并对其进行了整体模块与分模块的建模与仿真，仿真结果验证了所建立的系统方案的可行性以及系统参数设置的正确性。接着，本文对前面提出的TOD自同步法进行了Simulink的建模与仿真，通过仿真，验证了该方案的可行性及有效性。最后，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。更多还原

【Abstract】 With the rapid development of science and technology, electronic war has become the core of modern wars. It is the ultimate goal of the warring parties to grasp the initiative in the fierce electronic war. In the complicated electromagnetic environment, communication countermeasure appears particularly important in avoiding enemy’s interferences successfully, only in this way, the communication can be normally carried on with high-quality. When Frequency Hopping Spread Spectrum (FHSS) communication appears, it has attracted much attentions, especially in the field of military, because of its abilities of anti-jamming and anti-fading. Frequency Hopping Spread Spectrum communication can be carried out normally only in the support of synchronization. The receiver can correctly receive and demoldulate the data information under the condition of strict synchronization of both sides. Therefore, how to realize fast and accurate synchronization in high-speed FHSS system is a hotspot in the field of frequency hopping technology, and also an aporia.Under the background of project "XXXX system", this thesis mainly studies the de-hopping and synchronization of signals in high-speed FHSS system. According to the basic theories, it puts forward a design scheme for the high-speed FHSS system, and completes its modeling and simulation with Simulink software. Through the simulation, the system has realized its synchronization and de-hopping correctly. At the same time, the thesis also raises an improved scheme for synchronization-TOD self-synchronization method, which combines time of day(TOD) and synchronization-head. After, the thesis makes a model of FHSS system with TOD self-synchronization method, and the simulation results verify its effectiveness.Firstly, this thesis makes a systematic introduction of Frequency Hopping Spread Spectrum communication, specifically from the aspects of research backgrounds, research status and development trend, basic theories, technology advantages and key technologies. Then it intro-duces the synchronization technologies in details, including the theories of several commonly used synchronization technologies and their performance comparisons. Expect these, this thesis also puts forward a more suitable synchronization technology--TOD self-synchronization method for high-speed Frequency Hopping Spread Spectrum communication system and makes a theoretical introduction of its principles and performances. Secondly, this thesis gives a whole design scheme of high speed Frequency Hopping system according to the theories, carries on the modeling and simulation of the system from the overall to the part. The simulation results verify the feasibility of the system scheme and the accuracy of the system parameters.Next, this thesis makes a modeling and simulation for TOD self-synchronization method mentioned before with Simulink. The simulation results also validate the feasibility and effectiveness of the scheme.Finally, this thesis makes an overall summary about the finished work, points out the shortcomings and makes specific arrangements for next stage.更多还原