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Alternative code acquisition methods for WCDMA systems.

机译:WCDMA系统的替代代码获取方法。

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摘要

In a CDMA cellular system, the process of the mobile station searching for a cell and achieving code and time synchronization to its downlink scrambling code is referred to as cell search. In WCDMA, the cell search is divided into five acquisition stages: slot synchronization, frame synchronization and scrambling code group identification, scrambling code identification, frequency acquisition, and cell identification. A pipelined process of the first three stages minimizes the average code and acquisition time. This report presents algorithms and results for serial search and pipeline search. The acquisition times in different cases are compared. We present six policies. A simulation testbed is used to compare the performance of the six algorithms. It is shown from the simulation results that system performance is greatly improved by using modified cell search. Our WCDMA algorithms is shown to outperform the other algorithms in all of the test situations considered (e.g., AWGN channel, four types of fading channels). In addition, our algorithm requires less time to get code acquisition than the other algorithms.
机译:在CDMA蜂窝系统中,移动台搜索小区并实现与其下行扰码的代码和时间同步的过程称为小区搜索。在WCDMA中,小区搜索分为五个获取阶段:时隙同步,帧同步和扰码组标识,扰码标识,频率获取和小区标识。前三个阶段的流水线处理使平均代码和获取时间最小化。该报告介绍了串行搜索和管道搜索的算法和结果。比较不同情况下的采集时间。我们提出了六项政策。仿真测试台用于比较这六个算法的性能。从仿真结果可以看出,使用改进的小区搜索可以大大提高系统性能。在所有考虑的测试情况下(例如AWGN信道,四种类型的衰落信道),我们的WCDMA算法均优于其他算法。另外,我们的算法比其他算法需要更少的时间来获取代码。

著录项

  • 作者

    Zhang, Hui.;

  • 作者单位

    Concordia University (Canada).;

  • 授予单位 Concordia University (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.A.Sc.
  • 年度 2002
  • 页码 86 p.
  • 总页数 86
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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