Cramer-Rao Low Bound for Location and Time Delay Estimation Algorithm in Multi-User Environments

WANG Wei; XIONG Jin-yu; ZHU Zhong-liang

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Cramer-Rao Low Bound for Location and Time Delay Estimation Algorithm in Multi-User Environments

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- Cramer-Rao Low Bound for Location and Time Delay Estimation Algorithm in Multi-User Environments
- Acta Electronica Sinica Vol. 33, Issue 1, Pages: 131-134(2005)
- 作者机构：
  
  西南电子电信技术研究所重点实验室,四川,成都,610041
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.53
- Published：2005
- 稿件说明：
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WANG Wei, XIONG Jin-yu, ZHU Zhong-liang. Cramer-Rao Low Bound for Location and Time Delay Estimation Algorithm in Multi-User Environments[J]. Acta Electronica Sinica, 2005, 33(1): 131-134.
DOI：

WANG Wei, XIONG Jin-yu, ZHU Zhong-liang. Cramer-Rao Low Bound for Location and Time Delay Estimation Algorithm in Multi-User Environments[J]. Acta Electronica Sinica, 2005, 33(1): 131-134. DOI：

摘要

本文针对码分多址(CDMA)系统

推导了基于到达时间(TOA)的移动台定位所具有的估计精度下限

给出了定位估计精度下限推导的具体步骤和下限表达式

分析了该下限所具有的物理意义

得到了定位精度下限与用户数无关的结论.同时

提出了在长码扩频条件下能够抑制多址干扰(MUI)的时延估计算法

进一步说明了精度下限的物理含义.最后在仿真的基础上对估计下限和新算法的性能进行了讨论.

Abstract

In this paper

the Cramer-Rao low bound (CRLB) for mobile station location based on time of arrival (TOA) in CDMA system is obtained.The detailed deduction and the expression of CRLB are showed and the physical interpretation is discussed.From the CRLB

the conclusion that the CRLB for location is not related with user's numbers is obtained.A new time delay estimation algorithm which can restrain muti-user interferes (MUI) is raised.The method explains the CRLB more sufficiently.The paper discusses some numerical examples based on simulation experiments.

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罗来源

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Related Institution

School of Information and Communication Engineering， Harbin Engineering University

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Colege of Computer and CommunicationHunan UniversityChangshaHunan 410082China

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