Two-step ranging based on energy detection for IR-UWB sensor networks

ZHANG Ting-ting1; ZHANG Qin-yu2; ZHANG Nai-tong1

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Two-step ranging based on energy detection for IR-UWB sensor networks

更新时间：2024-10-14

- Two-step ranging based on energy detection for IR-UWB sensor networks
- Vol. 30, Issue 8, Pages: 96-104(2009)
- 作者机构：
  
  1. 哈尔滨工业大学电子与信息技术研究院
  2. 哈尔滨工业大学深圳研究生院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH761.2;TP212.9
- Published：2009
- 稿件说明：
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ZHANG Ting-ting1, ZHANG Qin-yu2, ZHANG Nai-tong1. Two-step ranging based on energy detection for IR-UWB sensor networks[J]. 2009, 30(8): 96-104.
DOI：

ZHANG Ting-ting1, ZHANG Qin-yu2, ZHANG Nai-tong1. Two-step ranging based on energy detection for IR-UWB sensor networks[J]. 2009, 30(8): 96-104. DOI：

摘要

针对无线传感器网络节点低成本、低运算能力的特点

基于脉冲超宽带技术的无线传感器网络提出了一种基于能量检测的两步测距法。这种方法针对DP(direct path)分量进行TOA(time of arrival)估计

具体包含对DP所在能量块的广义似然比检验和能量块内对DP精确位置的极大似然估计两部分。给出了DP能量块检测概率和估计结果的闭合表达式

通过理论和数值分析了积分长度等系统参数对于TOA估计性能的影响

并建立了估计误差的数学模型。最后通过仿真结果进行了性能比较

并验证了分析结论。与传统方法比较的结果表明

该算法可以在复杂度较低的条件下取得一定的性能提升。

Abstract

In order to design a low computational and cost ranging method for the IR-UWB （impulse radio ultra wideband） wireless sensor network

a two-step DP （direct path） component TOA （time of arrival） estimation algorithm based on energy detection was proposed. The first step was to determine DP energy block in which located by GLRT （generalized likelihood ratio test）. During the second step

the refined position of DP within the detected block was obtained by ML （maximum likelihood） estimation. A mathematical error model was set up for the two-step method which was veri-fied by the simulation results

and system parameters that affected the performance were studied by analytical and numerical methods. The results

compared with traditional ranging methods

show that this method achieves relative high performance under low complexity conditions.

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