An audio localization method based on emission angle estimation

A positioning method and emission angle technology, which can be used in specific environment-based services, wireless communications, electrical components, etc., can solve the problem of low indoor positioning accuracy, and achieve the effects of low time synchronization requirements, cost reduction, and wide coverage.

Active Publication Date: 2021-12-17
WUHAN UNIV
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Problems solved by technology

[0003] The present invention solves the problem of low accuracy of indoor positioning in the prior art by providing an audio positioning method based on emission angle estimation

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  • An audio localization method based on emission angle estimation
  • An audio localization method based on emission angle estimation

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Embodiment Construction

[0024] Since the transmission speed of sound is much lower than that of electromagnetic wave signals, it is easy to achieve synchronization, and has the advantages of low energy consumption and low cost; the acoustic characteristics are not easily disturbed, and the working distance can reach tens of meters, which can effectively meet the signal coverage of indoor scenes. In addition, a directional signal beam can be formed based on a single sound source transmitter. Taking advantage of this advantage, the present invention provides an audio positioning method based on angle estimation, which can realize low-cost, high-precision, and wide-coverage indoor positioning.

[0025] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] This embodiment provides an audio positioning method based on emission a...

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Abstract

The invention belongs to the technical field of indoor positioning, and discloses an audio positioning method based on emission angle estimation. At least two base stations with known position information and attitude information are arranged, and each base station is equipped with an array of sound source emitters. The array includes several sound source transmitters that transmit sound signals in different directions; each base station continuously transmits sound signals with identification codes through the sound source transmitters, and the identification codes of the sound signals emitted by different sound source transmitters are uniquely determined and Different from each other; the receiving end receives all sound signals from all base stations, and demodulates the sound signals to obtain the angular probability distribution between the receiving end and the base station; according to the angular probability distribution, the best spatial estimation corresponding to the receiving end and each base station is obtained Angle: According to the best spatial estimation angle in the base station coordinate system, the position information and attitude information of the base station, the spatial position of the receiving end is obtained. The invention solves the problem of low accuracy of indoor positioning.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning, and more particularly relates to an audio positioning method based on emission angle estimation. Background technique [0002] With the development of indoor and outdoor positioning technology, there is a huge demand for wide-coverage and multi-level location services. At present, GNSS-based positioning has matured in outdoor scenarios, but in complex spaces such as indoors, urban canyons, and underground areas, positioning cannot be achieved due to the difficulty of GNSS access. Therefore, radio frequency signals such as WIFI, Bluetooth, and ultra-wideband have been developed. Techniques for Indoor Positioning Research. However, the indoor scene is complex and changeable, and the electromagnetic field environment is unstable, which greatly affects the positioning accuracy. In addition, the cost and power consumption of relatively mature ultra-wideband positioning solutions are too h...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/33H04W64/00
CPCH04W4/33H04W64/00
Inventor 陈亮梁劲松周鑫陈锐志
Owner WUHAN UNIV
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