丁昊成　彭军伟,2　杨　平

(1.武汉船舶通信研究所　武汉　430205)(2.哈尔滨工程大学信息与通信工程学院　哈尔滨　150001)



一种超短波信道跳频同步方法及仿真*

丁昊成1彭军伟1,2杨平1

(1.武汉船舶通信研究所武汉430205)(2.哈尔滨工程大学信息与通信工程学院哈尔滨150001)

摘要同步是跳频通信系统关键技术之一。针对超短波跳频通信系统中同步的需求,提出了一种跳频同步方法,利用时间信息划分同步时隙,采用自同步头法并利用跳频同步信息中携带的相关码和TOD信息,实现准确、快速的初始同步。主要研究了跳频同步信息格式、跳频图案同步、跳频跟跳等问题,并对其同步性能进行了分析。仿真结果表明该跳频通信系统的初始同步时间能够满足需求,并且在高斯白噪声信道以及战术信道具备良好的捕获概率。

关键词自同步法; 同步跟跳; 同步时隙; 跳频同步信息

Frequency Hopping Synchronization Method and Simulation in VHF Channel

DING Haocheng1PENG Junwei1,2YANG Ping1

(1. Wuhan Maritime Communication Research Institute, Wuhan430205) (2. College of Information and Communication Engineering, Harbin Engineering University, Harbin150001)

AbstractSynchronization is one of the key techniques to frequency-hopping(FH) communication. Based on the requests of synchronization for a VHF FH communication system, this paper puts forward a synchronization scheme, which is achieved accurately and rapidly by using a self synchronization-head method combined correlation code with time of day, which contains synchronous interval information. This paper mainly studies frame format of FH synchronization, synchronization of FH pattern, FH tracking, and so on. The performance of synchronization shows that the time of initial synchronization in FH communication system meets the requirements. In addition, simulation under the gauss white noise channel and tactical channel indicates that the system has high capture probability.

Key Wordsself synchronization, FH tracking, synchronous interval, FH synchronization information

Class NumberTN91

1引言

跳频通信是现代通信领域中一种有效的抗干扰通信手段。对于中低速跳频通信形成直接的威胁主要有跟踪式干扰或转发式干扰。能够有效对抗这种干扰的措施是提高跳速。这样研究高速跳频通信系统成为了必然[1]。跳频同步建立的快慢和同步系统的抗干扰能力,直接影响跳频系统的性能,跳频同步的实现是跳频通信的难点。

跳频同步的关键是跳频图案的同步,常用的跳频同步方法有独立信道法、参考时钟法、同步字头法、自同步法[2]。独立信道法利用专门的信道来传送同步信息,易于被敌方发现和干扰。……