| 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. |
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| 基金项目: |
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| 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 |
