摘要
跳频电台同步系统要求具有良好的抗干扰性能和保密性能,同时达到快速同步。针对传统的时间信息和同步字头相结合的同步方案,提出了一种基于差分跳频原理的高速跳频同步方案。发送端利用载波的前后相关性来传送同步信息,接收端通过频率侦测获取同步信息,简化了传统方案中同步信息的编码、调制等过程。仿真结果表明,方案的同步性能有较大改善,同步时间短,抗干扰能力强。
The synchronization system of Frequency-Hopping （FH） broadcasting station requires well antijamming and security performance and quick synchronization. Based on the traditional synchronization scheme of combining synchronization-head with Time of Day （TOD）, the authors put forward a synchronization scheme of a high-speed FH system based on the Differential Frequency Hopping （DFH） theory. The transmitter transmits the synchronization information by using the relativity of adjacent carrier waves, and the receiver gains them by detecting the carrier waves＇ frequency. The scheme simplifies traditional transmit process including encoding and modulation. Simulation result shows that the performance of synchronization is improved, the time for synchronization is shortened, and the anti-jamming performance is also improved.
出处
《电光与控制》
北大核心
2007年第5期94-97,共4页
Electronics Optics & Control
关键词
高速跳频通信
时间信息
差分跳频
G函数
短时傅里叶变换
初始同步
high-speed frequency-hopping communication
time of day
Differential Frequency Hopping （DFH）
G function
STFT
initial synchronization
