| 一种用于DS-CDMA基站的全数字非相干延迟锁相环 |
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| 引用本文： | 刘正军,冉崇森,胡悍英. 一种用于DS-CDMA基站的全数字非相干延迟锁相环[J]. 电讯技术, 2005, 45(1): 124-128 |
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| 作者姓名： | 刘正军 冉崇森 胡悍英 |
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| 作者单位： | 解放军信息工程大学,通信工程系,河南,郑州,450002 |
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| 摘 要： | 本文根据直接序列扩频码分多址(DS-CDMA)系统上行链路伪随机码跟踪的特点,给出并分析一种全数字非相干延迟锁相环 (DLL),该DLL采用了二元鉴相和数字序贯滤波的实现结构。文中推导了多用户环境下环路的数学模型及鉴相误差统计特性,给出了跟踪性能的计算机仿真结果。研究结果表明,本文给出的DLL能以小的复杂度实现良好的跟踪性能,具有较高的应用价值。
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| 关 键 词： | 直接序列扩频码分多址 延迟锁相环 内插滤波 序贯滤波 |
| 文章编号： | 1001-893X(2005)01-0124-05 |
A Full-digital Non-coherent Delay-locked Loop for Code Tracking in DS-CDMA Base Station |
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| LIU Zheng-jun,RAN Chong-sen,HU Han-ying. A Full-digital Non-coherent Delay-locked Loop for Code Tracking in DS-CDMA Base Station[J]. Telecommunication Engineering, 2005, 45(1): 124-128 |
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| Authors: | LIU Zheng-jun RAN Chong-sen HU Han-ying |
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| Abstract: | A kind of full-digital non-coherent delay-locked loop (DLL) for up-link Pseudo Noise(PN) code tracking in DS-CDMA systems is proposed and analyzed. With a binary digital phase detector and a digital sequential filter this DLL achieves good tracking performance with low implementation complexity. Analysis of the DLL is provided under AWGN and multi-user environments, and some numerical results are presented by computer simulations to demonstrate the good behavior of the proposed DLL. |
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| Keywords: | DS-CDMA Delay-locked loop(DLL) Interpolation filter Sequential filter |
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