Indoor passive target positioning method based on received signal strength

A technology for receiving signal strength and target positioning, which is applied in the field of target detection and tracking in wireless networks, and can solve problems such as large multipath interference, inaccuracy, and complex and inflexible measurement methods.

Inactive Publication Date: 2014-02-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0007] Aiming at the problems of large multipath interference and complex, inflexible or inaccurate measurement methods in indoor wireless positioning technology, the present invention proposes a new passive indoor positioning measurement method based on RSS

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  • Indoor passive target positioning method based on received signal strength
  • Indoor passive target positioning method based on received signal strength
  • Indoor passive target positioning method based on received signal strength

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Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with accompanying drawing and embodiment, also described the technical problem and beneficial effect that the technical solution of the present invention solves simultaneously, it should be pointed out that described embodiment is only intended to facilitate the understanding of the present invention, and It has no limiting effect on it.

[0056] figure 1 It is an implementation flow chart of an indoor passive target positioning method based on received signal strength, which specifically includes the following steps:

[0057] Step 1: Deploy n wireless nodes in an indoor area, all nodes are on the same plane, and each node can measure the RSS value of wireless signals sent by other nodes;

[0058] The distribution of experimental nodes is as follows figure 2 As shown, all nodes are on the same plane, and the coordinates of each node are known, which is (x i ,y i ), i∈[1,2,...,n].

[0059] The e...

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Abstract

The invention discloses an indoor passive target positioning method based on received signal strength, and belongs to the technical field of target detection and tracking in a wireless network. Considering the situation that a link is blocked by a target, the method is mainly applied to detection of links with a shadow fading phenomenon before positioning. The method comprises the steps of node arrangement, measurement of change values of the received signal strength of all the links when a monitored area is free of targets and a target enters the monitored area, time domain detection for excluding some mutant links without the shadow fading phenomenon, space domain detection for excluding the links with the shadow fading phenomenon far away from the actual position of the target, and estimation of the position of the target according to the links with the shadow fading phenomenon. The indoor passive target positioning method based on received signal strength is easy and flexible to implement; moreover, in combination with a time domain and space domain detection method, the influence of the links without the shadow fading phenomenon is effectively eliminated, the attenuation effect brought by the target is highlighted more accurately, so that indoor target positioning is more accurate, and better dynamic tracking is realized.

Description

technical field [0001] The invention relates to an indoor passive target positioning method, in particular to a precise positioning technology based on Received Signal Strength (RSS), which belongs to the technical field of target detection and tracking in wireless networks. Background technique [0002] The technology of positioning and tracking human targets without any electronic tags has become a hot spot in recent years. [0003] Because people will cause signal attenuation when they are in the wireless link, the tracking and positioning of the target can be realized by measuring the change of RSS. Since most existing wireless devices, such as WiFi or WSN (Wireless Sensor Network) nodes, can provide RSS values, low-cost positioning can be achieved without additional hardware conditions in applications. [0004] However, in the positioning technology based on RSS variation, the variation of RSS may come from the attenuation effect caused by the occlusion of the target o...

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Application Information

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IPC IPC(8): G01S5/14G01S5/12
CPCG01S5/12G01S5/14
Inventor 王正欢刘珩许胜新卜祥元安建平湛沙范远璋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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