| QPSK载波锁相环的鉴频辅助方法研究 |
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| 作者姓名： | 丁丹 程乃平 郝建华 江修富 |
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| 作者单位： | 装备指挥技术学院研究生院 北京101416(丁丹)，装备指挥技术学院光电装备系 北京101416(程乃平，郝建华，江修富) |
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| 摘 要： | 讨论克服锁相环不能兼顾捕获速度和跟踪精度的弱点,简要分析锁相环和锁频环的基本原理,引出锁相环的鉴频辅助方法,然后在此基础上对QPSK载波锁相环的鉴频辅助实现方法进行研究、仿真,仿真结果表明,在保证很高跟踪精度的前提下,附加鉴频辅助的锁相环捕获速度有了很大提高,能够很快提取出同频同相的相干载波。
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| 关 键 词： | QPSK 锁相环 锁频环 捕获 跟踪 |
Study of the Realization of QPSK Carrier Phase-locked Loop Aided by Frequency-detection |
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| Authors: | Ding Dan Cheng Naiping Hao Jianhu Jiang Xiufu |
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| Abstract: | The operation mechanisms of the phase-locked Loop and frequency-looked loop are analyzed briefly.Then,the realization of a phaselocked loop aided by frequency-locked loop is proposed and analyzed.The simulation results show that,the phase-locked loop aided by a frequency locked loop can speed up the carrier acquisition and benefit the extraction of a coherent carrier,at the same time it can guarantee a high tracking prescision well. |
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| Keywords: | QPSK phase-locked loop Frquency-locked loop Acquistion Tracking |
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