| 基于可变带宽数字锁相环的快速载波同步 |
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| 作者姓名： | 陈希 张锐 |
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| 作者单位： | 中国科学院微系统与信息技术研究所微小卫星联合重点实验室; |
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| 摘 要： | 锁相环的环路带宽和捕获时间是两个相互制约的因素。提出一种基于最小均方误差准则的自适应调整环路带宽的数字锁相环,能将锁相环的入锁时间缩短为常规锁相环需要时间的1/10,同时在稳态下达到很小的环路带宽以抑制相位噪声。
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| 关 键 词： | 可变带宽 载波同步 数字锁相环 快速同步 |
Fast Carrier Synchronization with Adjusted Bandwidth DPLL |
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| Authors: | Chen Xi Zhang Rui |
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| Abstract: | DPLL(Digital Phase-Locked Loop) always requires fast carrier synchronization and narrow bandwidth to suppress noise.But the two requirements are in conflict with each other.This paper puts forward a new algorithm which adjusts the bandwidth of the DPLL based on the MMSE(Minimum Mean Square Error) criteria to achieve fast synchronization and reaches narrow bandwidth in the steady state to suppress noise. |
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| Keywords: | Adjusted bandwidth Carrier synchronization DPLL Fast synchronization |
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