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Indoor positioning method based on channel state information and received signal strength

A technology for receiving signal strength and channel state information, applied in the field of positioning and navigation, can solve the problems of poor real-time performance, low positioning accuracy, and high positioning cost, and achieve the effect of short positioning time, low cost, and avoiding the influence of positioning accuracy.

Inactive Publication Date: 2019-10-22
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] The purpose of the present invention is to provide an indoor positioning method based on channel state information and received signal strength, which mainly solves the problems of low indoor positioning accuracy, high positioning cost and poor real-time performance

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  • Indoor positioning method based on channel state information and received signal strength
  • Indoor positioning method based on channel state information and received signal strength
  • Indoor positioning method based on channel state information and received signal strength

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1 As shown, the present invention discloses an indoor positioning method based on channel state information and received signal strength. The indoor positioning method uses a TP-Link router as a transmitter, and inserts an Inter5300 wireless network card into a computer as a signal receiving end. It mainly includes the following steps:

[0031] Step 1. Receive the signal sent by the transmitter;

[0032] Step 2, extracting channel state information (CSI) amplitude value and received signal strength (RSSI) measurement value in the signal;

[0033] Step 3, performing data dimensionality reduction and feature extraction on channel state information (CSI) amplitude values ​​to obtain a data set;

[0034] Step 4. Perform offlin...

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Abstract

The invention provides an indoor positioning method based on channel state information and received signal strength. The indoor positioning method mainly comprises the following steps: receiving a signal sent by a transmitter; extracting a channel state information amplitude value and a received signal strength measurement value in the signal; performing data dimension reduction and feature extraction on the channel state information amplitude value to obtain a data set; performing offline recursive learning on the obtained data set and the received signal strength to obtain a position-based regression function; and substituting the data set obtained on line and the received signal strength measurement value into a regression function so as to predict / estimate the position by utilizing theregression function. Compared with the prior art, the method provided by the invention can effectively avoid the influence of the multipath effect on the positioning accuracy, and has the characteristics of short positioning time, low algorithm complexity, low cost and the like.

Description

technical field [0001] The invention uses channel state information and received signal strength to locate an indoor target through a machine learning method, and belongs to the field of positioning and navigation. Background technique [0002] With the development of society, people's demand for indoor positioning is also increasing. However, common positioning technologies have disadvantages such as high cost, high power consumption, and poor stability. For example, although infrared positioning technology can achieve high accuracy, infrared signals are easily interfered by sunlight and fluorescence, and infrared rays cannot penetrate obstacles such as walls, so only short-distance line-of-sight positioning can be performed. Bluetooth positioning technology is mainly based on received signal strength (RSSI). Because signal attenuation is not only related to distance, but also includes multipath loss, etc., this method has poor stability and poor positioning effect. [0...

Claims

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Application Information

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IPC IPC(8): H04W4/021H04W4/33G01S5/02
CPCG01S5/0257H04W4/021H04W4/33
Inventor 颜俊马传辉杨孟渭康彬
Owner NANJING UNIV OF POSTS & TELECOMM
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