在卫星光通信系统中,由于激光束非常窄,且传输距离远,所以瞄准、捕获和跟踪(Pointing Acquisition and Tracking, PAT)技术是光通信链路成功建立和保持的关键技术。
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其中，伪码同步模块主要分为捕获和跟踪两个部分。
The most important module is the pseudo code synchronous module. The process has two parts:capture and track.
高动态接收机的捕获和跟踪技术一直是研究的热点和难点。
The acquisition and tracking technology of high dynamic receiver has always been the research hotspot and difficulty.
采用滑动相关捕获和延迟锁定环实现伪码的同步、捕获和跟踪；
Slip correlative taking and delay locked loop are used for the synchronization, taking, locking of PN code.
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