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Circular polarized wave positioning method applicable to TD-SCDMA network

A technology of circularly polarized waves and positioning methods, applied in communication between multiple stations, electrical components, radio/inductive link selection and arrangement, etc., can solve unstable system performance, low positioning accuracy, and lack of satellite reception Signal satellite signal is weak and other problems, to reduce the impact of environmental changes, to achieve precise positioning, high positioning stability

Inactive Publication Date: 2008-07-16
CHONGQING UNIV OF POSTS & TELECOMM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the widely used GPS positioning technology cannot be applied indoors because the satellite signal cannot be received or the satellite signal is too weak. The technologies such as CELL-ID and TDOA that can be adopted for indoor positioning cannot meet the needs of users due to the low positioning accuracy.
When the positioning method based on wireless local area network is implemented, a large number of third-party devices need to be installed, and the cost of installation and maintenance is very expensive. Moreover, the technical environment has a great impact, and the system performance is very unstable, which seriously affects the further improvement of positioning accuracy.

Method used

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  • Circular polarized wave positioning method applicable to TD-SCDMA network
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  • Circular polarized wave positioning method applicable to TD-SCDMA network

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Embodiment Construction

[0009] Such as figure 1 As shown, the architecture of the service when using the polar wave indoor positioning system independently is described. The launch point and reference point for emitting circularly polarized waves are laid indoors. When the system is used independently, the launch point emits circularly polarized waves. The mobile terminal uses wireless communication methods such as Bluetooth or wireless LAN to control the launch point to emit different frequencies. The electromagnetic wave, by distinguishing the different frequencies of the electromagnetic wave, or the code division multiplexing of the single-frequency signal emitted by the transmitting point, etc. to distinguish each transmitting point; the mobile terminal is equipped with a polarized antenna that matches the transmitting point and ensures that it can be used anywhere in the room Receive signals transmitted by at least 3 transmitting points, and at the same time, the mobile terminal integrates locat...

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Abstract

The invention relates to an indoor positioning method based on electromagnetic wave polarization technique, wherein the invention arranges some emitters indoor, to radiate polarized electromagnetic wave, mobile phone or other mobile terminals via polarized antennas can receive the direct signal but shield the energy of reflective signals, to restrain the condition effect; via the energy of direct signals, it can build signal strength database, when it can receive three emitters, it can accurately position indoor. The inventive system can be used in indoor position service and based on other wireless communication networks to realize seamless position, combined with outdoor position technique.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to the wireless positioning technology utilizing the polarization properties of electromagnetic waves. Background technique [0002] At present, the widely used GPS positioning technology cannot be applied indoors because the satellite signal is not received or the satellite signal is too weak. The technologies such as CELL-ID and TDOA that can be adopted for indoor positioning cannot meet the needs of users due to the low positioning accuracy. When the positioning method based on wireless local area network is implemented, a large number of third-party devices need to be installed, and the cost of installation and maintenance is very expensive. Moreover, the technical environment has a great impact, and the system performance is very unstable, which seriously affects the further improvement of positioning accuracy. Contents of the invention [0003] The present inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04B7/26H04W64/00
Inventor 袁正午李恭伟叶玮夏英邹永贵刘兆宏鱼详训周鹏葛君伟裵海英
Owner CHONGQING UNIV OF POSTS & TELECOMM
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