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Non-fingerprint passive positioning method based on Wi-Fi signals

A positioning method, WI-FI technology, applied in wireless communication, electrical components and other directions, can solve the problem of unable to find information representation method, no model use, only fingerprint collection and extraction.

Active Publication Date: 2016-12-07
NORTHWEST UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Therefore, some researchers extract and locate the CSI information, but there are still the following problems: 1. There is no ready-made model for the location based on CSI information, and only fingerprint collection and extraction can be performed; 2. Due to the fact that multiple subcarriers are independent of each other based on CSI information, , unable to find a general information representation

Method used

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  • Non-fingerprint passive positioning method based on Wi-Fi signals
  • Non-fingerprint passive positioning method based on Wi-Fi signals
  • Non-fingerprint passive positioning method based on Wi-Fi signals

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Embodiment Construction

[0076] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0077] This embodiment describes a non-fingerprint passive positioning method based on WI-FI signals, which includes the following steps:

[0078] Step 1. According to the indoor situation, build a WI-FI transceiver network, including the transmitter a and the receiver b, and the WI-FI transceiver network includes at least two links; in order to ensure the experimental effect, the network requires that the information sending device will not Conflict with each other, and try not to conflict with other WI-FI devices.

[0079] Step 2, in the constructed WI-FI transceiver network, collect the CSI value in the WI-FI signal, and the collected CSI value is divided into a test CSI value and an actual CSI value, wherein the test CSI value is:

[0080] (2-1-1) The initial CSI value when there is no target in the WI-FI transceiver network;

[0081] (2-1-2) Th...

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Abstract

The invention discloses a non-fingerprint passive positioning method based on Wi-Fi signals. The method comprises the following steps: Step 1, constructing a Wi-Fi transceiving network; Step 2, collecting CSI values in the Wi-Fi signals; Step 3, carrying out filtering and pretreatment processes; Step 4, estimating an effective height and matching parameters of a target to be detected; Step 5, obtaining an attenuation value of the target to be detected through the matching parameters, and determining an area where the target to be detected is located through the attenuation value; and Step 6, positioning the target. Compared with the fingerprint positioning method, the method provided by the invention has the advantages that the problem of large time and labor consumption during fingerprint collection is solved, and high robustness and practicality are achieved; and through the extraction of CSI information from the Wi-Fi signals, the problem of low positioning precision in the conventional non-fingerprint positioning method is solved.

Description

technical field [0001] The invention relates to the application of positioning, in particular to an indoor non-fingerprint passive positioning method. Background technique [0002] As people's activities in indoor spaces become more and more complex and sophisticated, the demand for services based on indoor location information is becoming increasingly strong. At present, urban positioning is mainly divided into two types: active positioning and passive positioning. The main difference is whether the target to be positioned carries related equipment. There is no need to carry equipment, and the positioning is performed according to the interference of the target on the characteristic information. Because in some application environments, the target does not want to carry related equipment, therefore, passive scenarios have become a research hotspot. [0003] In passive positioning, according to the acquired positioning information, positioning can be divided into passive p...

Claims

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Application Information

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IPC IPC(8): H04W64/00
Inventor 陈晓江王晔竹房鼎益王安文邢天璋王薇彭瑶张远王亮王举
Owner NORTHWEST UNIV
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