摘要
快速跳频系统具有跳速快、用一跳或者多跳传输一个调制符号而导致难以携带相关码等特点,为快跳跳频通信的实现带来了一定困难。提出了一种快慢速跳频相结合的时间信息TOD同步字头法的跳频同步解决方案。在同步建立阶段采用慢速跳频,并在同步信息帧格式中添加了转向数传阶段采用快速跳频的标志信息。方案结合快慢速跳频通信的特点,满足了同步阶段转向数传阶段时慢速跳频转向快速跳频的通信需求。分析了同步性能,仿真结果表明,跳频同步方案具有同步时间短、捕获概率高、虚警概率低的优点。
Fast frequency hopping system has the characteristics of fast hop rate and transmitting a modulation symbol by per hop or multi-hop, which makes it difficult to carry the correlation code and to achieve fast frequency hopping communication. For the limitation of fast frequency hopping, a scheme of frequency hopping synchronization of time information TOD synchronization prefix was proposed in this paper based on the combination of fast and slow frequency hopping. In synchronization establishment phase, slow frequency hopping was used, and the flag informa- tion indicated that the fast frequency hopping used in data transmission phase was added in the synchronization infor- mation frame format. This scheme combines the characteristics of fast and slow frequency hopping communication, which can meet the communication needs of slow frequency hopping changing to fast frequency hopping when synchro- nization phase changes to data phase. The performance of the scheme was analyzed, and the simulation results show that the scheme of frequency hopping synchronization has the advantages of short synchronization time, high capturing probability and low false alarm probability.
出处
《计算机仿真》
CSCD
北大核心
2014年第3期226-229,238,共5页
Computer Simulation
基金
国家高技术研究发展计划(863计划)(2012AA80XX03G)
辽宁省教育厅重点实验室项目(LS2010007)
关键词
快慢速跳频
跳频同步
时间信息
同步信息帧
Fast-slow frequency hopping
Frequency hopping synchronization
Time information
Synchronizationinformation frame
