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A Method of Estimating Arrival Angle Using Pattern Superposition Antenna for Indoor Positioning

A directional antenna and indoor positioning technology, applied in the field of indoor positioning and navigation, can solve the problems of poor positioning accuracy and stability of the RF signal attenuation model, and achieve the effect of high universality

Active Publication Date: 2021-04-13
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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  • A Method of Estimating Arrival Angle Using Pattern Superposition Antenna for Indoor Positioning
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  • A Method of Estimating Arrival Angle Using Pattern Superposition Antenna for Indoor Positioning

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0039] As shown in the accompanying drawings, the method for indoor positioning using a pattern superimposed antenna to estimate the angle of incoming waves 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 by polar coordinates are overlapped in pairs, and the included angles of adjacent patterns are consistent and consistent with the beam width. equal, the beam width 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 by these three directional antennas at the...

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Abstract

The invention discloses a method for estimating the incoming wave angle by using pattern superimposed antennas for indoor positioning, including adopting multiple directional antennas to be installed at the same point to realize overlapping of directional antenna patterns. The received signal strength (Rss) is differentially calculated by multiple directional antennas, and the AoA is estimated using the Rss differential value. The invention has the characteristics of low complexity and high AoA estimation accuracy, and creates conditions for improving the estimation accuracy of indoor moving target positions based on WLAN network and 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 indoor positioning by estimating the angle of arrival (AoA) based on the received signal strength (Rss). Background technique [0002] Indoor positioning system has developed very rapidly in recent years. With the popularization of 802.11X wireless local area network as a common network architecture, the indoor positioning technology based on WLAN has attracted more and more researchers' attention. In some environments where GPS signals cannot work well and WLAN signals have covered a large area, such as warehouses, libraries, airports and hospitals, relying on smartphones, 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 values ​​of the radio frequency signal used for positioning mainly include...

Claims

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Application Information

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