A common acquisition process of DS/FH hybrid spread spectrum signal is presented. It illuminates the acquisition methods of FH and introduces the fast acquisition methods of FH with fast scanning and pilot channel combine with the restrict of DS.
介绍了DS/FH混合扩频信号的一般捕获过程,说明了跳频的捕获方法,并结合混合扩频中跳频捕获受直扩制约的特点,介绍了运用快速扫描和导频信道进行跳频快捕方法。
参考来源 - DS/FH混合扩频信号捕获方法简述Trapped by the characteristics of burst communication system,an open-loop algorithm is applied to frequency deviation compensation,which makes carrier frequency deviation come into fast capture bandwidth,and then a phase-lock loop is used to track it for ending of the carrier synchronization.
针对突发通信系统的特点,采取一种开环算法进行频偏补偿,使其残余频偏落在锁相环的快捕带内,然后利用锁相环进行相位恢复,实现载波的快速同步。
参考来源 - 突发模式下载波同步技术·2,447,543篇论文数据，部分数据来源于NoteExpress
锁相环路具有快捕、量化精度高、抗干扰性强 ，任意可编程的特点。
This FDPLL is featured of quickly catching, high accuracy of quantization, Low susceptibility to i…
在传统四次方环基础上提出了一种适用于快捕的新方法——四次方环开关法；
This paper presents a new methodfourth law loop switching method, which is based upon the traditional fourth law loop and is suitable for fast acquisition.
实践表明：利用一种改进的FFT校频技术对载波频偏进行一次校频，能使载波频偏快速落入锁相环快捕带内。
It has been proved that an improved FFT frequency correction technology, which makes carrier frequency deviation come into fast capture bandwidth quickly, is presented to correct frequency.
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