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An indoor positioning method based on lora SX1280

An indoor positioning and real-time positioning technology, applied in the field of the Internet of Things, can solve the problems of reducing system positioning accuracy and increasing system complexity, achieving high positioning accuracy, eliminating the problem of susceptibility to interference, and improving consistency

Active Publication Date: 2020-06-23
HANGZHOU CCRFID MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual indoor environment, due to the influence of multipath, shadow effect, and people walking, the RSSI value from each AP point at a fixed position often shows complex time-varying statistical characteristics, which will reduce the system positioning accuracy and increase the system complexity.

Method used

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  • An indoor positioning method based on lora SX1280
  • An indoor positioning method based on lora SX1280
  • An indoor positioning method based on lora SX1280

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Embodiment Construction

[0036] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] Fig. 1 (a) and (b) are a kind of indoor positioning system device diagram based on LoRa SX1280 proposed by the present invention. It includes two kinds of devices, the movable node device shown in Fig. 1(a) and the fixed anchor device shown in Fig. 1(b). The LoRa module containing the SX1280 chip needs to be installed on both the mobile node device and the fixed anchor device. Semtech's SX1280 chip has a LoRa communication mode and a LoRa ranging engine mode.

[0038] figure 2 A special fingerprint feature based on LoRa SX1280 proposed for the present invention. This fingerprint feature includes ranging fingerprints and RSSI fingerprints; such as figure 2 As sh...

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Abstract

The invention discloses an indoor positioning method based on LoRa SX1280. The method includes: off-line fingerprint acquisition modeling phase and on-line real-time positioning phase. In off-line fingerprint acquisition modeling stage, first, special fingerprint features based on LoRa SX1280 are needed, which includes ranging fingerprint and RSSI fingerprint; Then when the special fingerprint isinputted into the fingerprint database, the special fingerprint needs to be pretreated by Gaussian filter; Finally, the improved support vector regression method is used to obtain the location calculation model. In on-line real-time positioning stage, first, the mobile node device and anchor device are used to collect t times in the indoor area to form t groups of special fingerprint features; Secondly, the median filtering method is used to obtain a unique fingerprint feature for the t groups of special fingerprint features; Finally, the unique fingerprint feature is substituted into the obtained computational model, and the coordinates of the nodes to be located are calculated. The invention eliminates the problem that fingerprints are easy to be disturbed.

Description

technical field [0001] The invention relates to the technical field of the Internet of Things, in particular to an indoor positioning method based on LoRa SX1280. Background technique [0002] LoRa technology is an ultra-long-distance wireless transmission scheme based on spread spectrum technology adopted and promoted by Semtech, and it belongs to one of the Low Power Wide Area Network (LPWAN) communication technologies. LoRa technology is no longer limited by the trade-off between transmission distance and power consumption, and provides users with a system that can achieve long transmission distance, low power consumption, and multiple nodes, thereby expanding into a network. [0003] With the increasing audience of LoRa technology, and its continuous development. Semtech then launched the SX1280 chip, which means the launch of LoRa in the 2.4GHz frequency band. The chip has a built-in ranging engine function, that is, a Time Of Arrival (TOA) ranging engine based on tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W4/33H04W64/00H04W4/021
CPCH04W4/02H04W4/023H04W4/33H04W64/00
Inventor 姚英彪陈宇翔姜显扬许晓荣刘兆霆冯维
Owner HANGZHOU CCRFID MICROELECTRONICS