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  • 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.    [点击复制]
  • .A Full-digital Non-coherent Delay-locked Loop for Code Tracking in DS-CDMA Base Station[J].,2005,45(1):124 - 128.   [点击复制]
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一种用于DS-CDMA基站的全数字非相干延迟锁相环
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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。
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
DOI:10.3969/j.issn.1001-893X.
基金项目:
A Full-digital Non-coherent Delay-locked Loop for Code Tracking in DS-CDMA Base Station
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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.
Key words:  DS-CDMA,Delay-locked loop(DLL),Interpolation filter,Sequential filter
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