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Method used for estimating incoming wave angle by directional diagram overlapped antennas and used for indoor positioning

A directional antenna and indoor positioning technology, which is applied in the field of indoor positioning and navigation, can solve the problems of poor positioning accuracy and stability of radio frequency signal attenuation models, and achieve high universal applicability

Active Publication Date: 2019-04-16
TIANJIN UNIV
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Problems solved by technology

[0004] However, indoor positioning based on Rss is easy to obtain due to noise (including channel noise and receiver processing noise), multipath (complex indoor environment causes serious multipath effects), uncertainty of radio frequency signal attenuation model (mainly including transmit power and attenuation factor) and other factors lead to poor positioning accuracy and stability

Method used

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  • Method used for estimating incoming wave angle by directional diagram overlapped antennas and used for indoor positioning
  • Method used for estimating incoming wave angle by directional diagram overlapped antennas and used for indoor positioning
  • Method used for estimating incoming wave angle by directional diagram overlapped antennas and used for indoor positioning

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in detail:

[0039] As shown in the accompanying drawings, the method for estimating the angle of arrival of the antenna for indoor positioning using a pattern superimposed antenna of the present invention includes the following steps:

[0040] Step 1. The anchor node in indoor positioning is composed of at least three directional antennas installed at the same point. The radiation field strength patterns of each directional antenna drawn in polar coordinates overlap in pairs and the angles between adjacent patterns are consistent and equal to the beam width. Equal, the beamwidth of the radiation field strength pattern of each directional antenna is the same;

[0041] As an embodiment of the present invention, such as figure 1 The pattern of three directional antennas is shown. The anchor node in indoor positioning is installed at the same point by these three dire...

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Abstract

The invention discloses a method used for estimating an incoming wave angle by directional diagram overlapped antennas and used for indoor positioning. The method comprises the steps that the multipledirectional antennas are used for common point installation to realize overlapping of directional diagrams of the directional antennas. Difference operation is carried out on received incoming wave signal strength (Rss) through the multiple directional antennas, and AoA is estimated by using an Rss difference value. The method has the characteristics of low complexity and high AoA estimation accuracy, and conditions are created for improving the indoor moving target position estimated accuracy based on the WLAN network and the Rss.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning and navigation, and in particular relates to a method for estimating angle of arrival (AoA) based on received signal strength (Rss) for indoor positioning. Background technique [0002] Indoor positioning systems have developed very rapidly in recent years. With the popularization of 802.11X wireless local area network as a common network architecture, WLAN-based indoor positioning technology has attracted more and more researchers' attention. In some environments where GPS signals do not work well and WLAN signals have covered a large area, such as warehouses, libraries, airports and hospitals, relying on smart phones, mobile computers or other mobile communication devices to achieve short-range positioning has become an indoor positioning business. The focus of the application. [0003] The measured value of the wireless radio frequency signal used for positioning mainly includes the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/26G01S5/02G01S5/04
CPCG01S3/26G01S5/0215G01S5/04
Inventor 冷文
Owner TIANJIN UNIV
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