Indoor range finding and positioning method based on MIMO-OFDM channel state information

A technology of MIMO-OFDM and channel state information, which is applied in positioning, wireless communication, measurement devices, etc., can solve the problems of difficult promotion and high implementation complexity

Active Publication Date: 2015-07-29
CHENGDU XIMENG TEKE TECH DEV CO LTD
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Problems solved by technology

However, the ranging and positioning method based o...

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  • Indoor range finding and positioning method based on MIMO-OFDM channel state information
  • Indoor range finding and positioning method based on MIMO-OFDM channel state information
  • Indoor range finding and positioning method based on MIMO-OFDM channel state information

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Embodiment Construction

[0061] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0062] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention provides an indoor range finding and positioning method based on MIMO-OFDM channel state information. A present commercial WiFi network card based on OFDM is fully utilized, channel state information CSI is obtained by a client at a position to be measured, an MIMO system whose receiving/transmitting end includes multiple antennas is combined, a free-space path loss model based on MIMO-OFDM is provided, the line of sight LOS distance between a WiFi access point AP of an indoor anchor point and a user at the position to be measured is calculated, and finally the position of the user is obtained by a classic three-side positioning method. The method is based on the multi-antenna WiFi AP which is used most widely at present and a mainstream wireless network card based on OFDM, and can realize rapid, simple and efficient indoor range finding and positioning.

Description

technical field [0001] The invention relates to the field of computer communication indoor distance measurement and positioning, in particular to an indoor distance measurement and positioning method based on MIMO-OFDM channel state information. Background technique [0002] At present, in the indoor positioning research, the positioning technology is mainly divided into three categories: (1) positioning technology based on special equipment; (2) positioning technology based on WiFi signal ranging; (3) positioning technology based on WiFi signal fingerprint. [0003] In the positioning technology based on special equipment, different technologies or equipment such as infrared, ultrasonic, VHF Omnidirectional Ranging, ultra-wideband, and radio frequency identification (RFID) are generally used to achieve indoor positioning. The common characteristics of these systems Yes: High accuracy (most of them can reach centimeter-level positioning accuracy), but they all rely on the de...

Claims

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Application Information

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IPC IPC(8): H04W64/00G01S5/02H04B7/06
CPCG01S5/0284H04B7/0626H04W64/003
Inventor 赵立廖勇
Owner CHENGDU XIMENG TEKE TECH DEV CO LTD
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