摘要
针对猝发式直扩系统中大频偏情况下信号载波的捕获和跟踪问题,提出了一种快速数字捕获和FFT辅助的Costas载波跟踪算法的载波同步实现方法。满足了有限长度导频序列内,在低信噪比和高动态条件下完成短时猝发信号捕获和载波跟踪的要求。
With regard to the issue of signal carrier acquisition and tracking in case of frequency deviation in bursting system, the method of rapid digital acquisition and FFT aided COSTAS algorithm are put forward, which fulfil the require- ments of rapid acquisition and tracking for intermittent bursting signal under low S/N ratio and high dynamic condition.
出处
《舰船电子工程》
2014年第4期181-183,共3页
Ship Electronic Engineering
关键词
载波捕获
数字锁相环
载波同步
carrier acquisition, digital phase-locked loop, carrier synchronization
