CN106019216A - 一种基于toa的室内人员被动式定位方法 - Google Patents

一种基于toa的室内人员被动式定位方法 Download PDF

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CN106019216A
CN106019216A CN201610313253.3A CN201610313253A CN106019216A CN 106019216 A CN106019216 A CN 106019216A CN 201610313253 A CN201610313253 A CN 201610313253A CN 106019216 A CN106019216 A CN 106019216A
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signal transmission
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CN106019216B (zh
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侯振寰
马永涛
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Tianjin University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/12Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0252Radio frequency fingerprinting

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

本发明涉及一种基于TOA的室内人员被动式定位方法,包括:布置多个超宽带信号发送机和接收机;接收到的超宽带信号通过低通滤波器,滤出可能携带目标信息的低频信号;对滤出的低频信号进行归一化处理,得到D(τ),采用门限判别方法,进行目标检测;判断人员存在后,采用线性查找时间估计算法,得到为人员所处信号传输路径的到达时间;根据人员所处信号传输路径的到达时间,得到信号传输路经的距离;估计目标位置。本发明具有精度高的优点。

Description

一种基于TOA的室内人员被动式定位方法
技术领域
本发明属于利用接收信号的到达时间进行室内人员被动式定位的领域,特别是针对复杂多径条件下的室内人员定位问题。
背景技术
随着移动通信与嵌入式技术的快速发展,基于位置的服务(LBS)已经受到人们广泛关注。LBS的核心是定位技术,目前,室外的定位技术如GPS等已经发展成熟,但是GPS信号受到建筑物的阻挡,难以实现室内环境下的定位。现阶段适用于室内定位的方法有很多,但是每种方法都存在各自的缺点。
在定位的过程中,定位目标可以采取主动的或是被动的方式进行参与。主动式定位往往要求定位目标佩戴信号收发设备,然而,在很多现实情况中,定位目标没有配备任何无线收发设备,这个时候需要另一种定位技术--被动式定位(Device-Free localization,DFL)。被动式定位既不需要定位目标携带任何设备,也不需要主动地参与定位,具有很好的应用前景与研究价值。如今,室内主动式定位的研究有很多,然而室内被动式定位还有很多待解决的问题,我们在这里主要研究室内人员的被动式定位。
发明内容
本发明的目的是提供一种可以具有较高精度且实用性强的室内人员被动式定位方法。技术方案如下:
一种基于TOA的室内人员被动式定位方法包括以下几个步骤:
1)在定位场景中布置多个超宽带信号发送机和接收机;
2)接收到的超宽带信号rm(τ)包含两个部分rm(τ)=rm,L(τ)+rm,H(τ),其中,rm,L(τ)为接收的低频信号,即为待估计的信号;rm,H(τ)为接收信号高频部分,将接收信号通过低通滤波器,滤出可能携带目标信息的低频信号rm,L(τ);
3)对滤出的低频信号rm,L(τ)进行归一化处理,得到D(τ),采用门限判别方法,根据滤出的低频信号进行目标检测,判断低频信号是否由人员的存在而引起的;
4)经过步骤3)判断人员存在后,采用线性查找时间估计算法,提取人员所处信号传输路径的到达时间,将最大的D(τ)值所对应的时间τ,视为人员所处信号传输路径的到达时间;
5)根据人员所处信号传输路径的到达时间,得到信号传输路经的距离;
6)待定位目标位于焦点为接收端与发送端的椭圆上,利用多个处于不同位置的收发设备组成的椭圆,通过最小二乘估计目标位置。
附图说明:
1为本发明流程框

Claims (1)

1.一种基于TOA的室内人员被动式定位方法包括以下几个步骤:
1)在定位场景中布置多个超宽带信号发送机和接收机;
2)接收到的超宽带信号rm(τ)包含两个部分rm(τ)=rm,L(τ)+rm,H(τ),其中,rm,L(τ)为接收的低频信号,即为待估计的信号;rm,H(τ)为接收信号高频部分,将接收信号通过低通滤波器,滤出可能携带目标信息的低频信号rm,L(τ);
3)对滤出的低频信号rm,L(τ)进行归一化处理,得到D(τ),采用门限判别方法,根据滤出的低频信号进行目标检测,判断低频信号是否由人员的存在而引起的;
4)经过步骤3)判断人员存在后,采用线性查找时间估计算法,提取人员所处信号传输路径的到达时间,将最大的D(τ)值所对应的时间τ,视为人员所处信号传输路径的到达时间;
5)根据人员所处信号传输路径的到达时间,得到信号传输路经的距离;
6)待定位目标位于焦点为接收端与发送端的椭圆上,利用多个处于不同位置的收发设备组成的椭圆,通过最小二乘估计目标位置。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107741225A (zh) * 2017-08-31 2018-02-27 天津大学 一种基于太阳能电池的被动式定位系统
CN111413970A (zh) * 2020-03-18 2020-07-14 天津大学 超宽带与视觉融合的室内机器人定位与自主导航方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010028527A (ja) * 2008-07-22 2010-02-04 Fujitsu Ltd 無線測位システム
CN102377452A (zh) * 2011-08-16 2012-03-14 中国科学技术大学 高速取样有限精度量化脉冲超宽带信号到达时间估计方法

Patent Citations (2)

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JP2010028527A (ja) * 2008-07-22 2010-02-04 Fujitsu Ltd 無線測位システム
CN102377452A (zh) * 2011-08-16 2012-03-14 中国科学技术大学 高速取样有限精度量化脉冲超宽带信号到达时间估计方法

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马永涛 等: "基于超宽带信号到达时间的室内人员被动式定位算法及仿真", 《天津大学学报(自然科学与工程技术版)》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107741225A (zh) * 2017-08-31 2018-02-27 天津大学 一种基于太阳能电池的被动式定位系统
CN111413970A (zh) * 2020-03-18 2020-07-14 天津大学 超宽带与视觉融合的室内机器人定位与自主导航方法

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