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Indoor positioning method and device based on tc-ofdm

A TC-OFDM, indoor positioning technology, applied in the field of indoor positioning based on time division code division orthogonal frequency division multiplexing, can solve the problem of long positioning time for initial point positioning, and achieve the effect of avoiding long positioning time

Active Publication Date: 2019-05-31
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a TC-OFDM-based indoor positioning method and device to solve the problem of long positioning time for initial point positioning in the prior art

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  • Indoor positioning method and device based on tc-ofdm
  • Indoor positioning method and device based on tc-ofdm
  • Indoor positioning method and device based on tc-ofdm

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0053] Since the number of currently available spreading code sequences is 50, it is limited, and the arrangement of indoor omnidirectional ceiling antennas for transmitting positioning signals in the prior art is not regular, and positioning signals may also penetrate walls indoors Therefore, it will cause the same spreading code sequence on different floors. The receiver terminal may receive positioning signals with the same spreading code sequence from diffe...

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Abstract

Embodiments of the present invention provide a TC-OFDM-based indoor positioning method and device. Receive the first positioning signal sent by the first indoor omnidirectional ceiling antenna and at least four second positioning signals sent by at least four second indoor omnidirectional ceiling antennas through the receiver terminal; the first positioning signal contains special spread spectrum code sequence; each second positioning signal contains non-special spread spectrum code sequence; the combination of special spread spectrum code sequence and non-special spread spectrum code sequence is used to identify the floor and floor area; query in the pre-stored spatial position code information table The spatial position corresponding to the special spreading code sequence and at least four non-special spreading code sequences, the spatial position is determined as the current initial point position of the receiver terminal; the spatial position coding information table includes the special spreading code sequence and the floor area The corresponding relationship between the non-special spreading code sequence group and the number of floors; the non-special spreading code sequence group contains at least four non-special spreading code sequences.

Description

technical field [0001] The present invention relates to the technical field of indoor positioning, in particular to an indoor positioning method and device based on Time & Code Division-Orthogonal Frequency Division Multiplexing (TC-OFDM). Background technique [0002] The indoor positioning system based on TC-OFDM is a high-precision positioning system, which adopts the integrated signal system of navigation and communication, based on the mobile communication network, and combined with the Beidou navigation system, to achieve high-precision positioning with seamless connection between indoor and outdoor areas. The indoor horizontal positioning accuracy can reach 3 meters, and the vertical positioning accuracy can reach 1 meter. Therefore, the TC-OFDM indoor positioning system has the advantages of high positioning accuracy, seamless connection with outdoor satellite positioning, and easy promotion. [0003] In the TC-OFDM indoor positioning system, the indoor omnidirection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/69H04W4/02H04W4/33
CPCH04B1/69H04W4/023
Inventor 邓中亮杨寅徐福海莫君贾步云肖占蒙
Owner BEIJING UNIV OF POSTS & TELECOMM