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Ultra-wideband node network-based device-free localization method

A technology of portable devices and node networks, which is applied in the field of non-portable device positioning and ultra-wideband target positioning based on direct path shadow fading estimation, and can solve problems such as multipath interference nodes and self-positioning

Active Publication Date: 2016-09-21
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] In order to solve the problems of multipath interference and self-location of nodes, the present invention proposes a method of using nodes to send ultra-wideband signals to realize DFL

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Embodiment Construction

[0056] The present invention will be described in detail below with reference to the drawings and embodiments, and the technical problems and beneficial effects solved by the technical solution of the present invention will also be described. The present invention proposes a method for positioning a portable device based on an ultra-broadband node network. The structural block diagram of the method is as follows figure 1 As shown, it specifically includes the following implementation steps:

[0057] Step 1: Node deployment

[0058] K ultra-wideband measurement nodes are randomly deployed around the monitoring area, such as figure 2 As shown, these K nodes are located on the same horizontal plane, assuming that the coordinates of the i-th node are x i =(x i ,y i ) T , i=1,2,...,K; each node can send and receive wireless signals, so the network can be considered fully connected and can form η=K(K-1) links; in addition, there are A base station node is responsible for rece...

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Abstract

The present invention discloses an ultra-wideband node network-based device-free localization method, belonging to the field of wireless localization technologies in a wireless network. According to the method, an ultra-wideband signal is sent by using a node so as to realize device-free localization (DFL), a channel pulse response in a line of sight (LOS) is detected, and localization is performed by using change of an LOS path signal power. In addition, the ultra-wideband node has a precise distance measurement capability, and can achieve precise node self-localization. Node self-localization is achieved by using distance measurement provided by the ultra-wideband node according to a cooperation localization method, shadow fading caused by shielding by a target is obvious, and an imaging effect is further improved, so that the method is more applicable to an environment with low LOS power, can improve localization precision in a more complex environment, and greatly reduces manpower and time cost for node deployment.

Description

technical field [0001] The invention relates to a positioning method for a portable device, which is an ultra-wideband target positioning method based on direct path shadow fading estimation, and belongs to the technical field of wireless positioning in wireless networks. Background technique [0002] Device-free localization (DFL) has gradually developed into an emerging technology in recent years, which allows the target itself not to carry any positioning device. The application of DFL is very extensive, because in many cases the target is unwilling to carry the positioning device or the target is non-cooperative. Therefore, DFL has many potential applications in intrusion detection, disaster relief, medical care, and military operations. Traditional DFL methods use optical and infrared methods, which have poor penetration and may violate privacy. With the popularization of wireless communication, the research of DFL based on wireless signal has gained a lot of attentio...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04B17/27G01S5/02
CPCG01S5/0215H04B17/27H04W64/00
Inventor 许胜新刘珩王正欢陈思思安建平卜祥元辛怡
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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