Technology of Network & Communication
|
App. Res. of Comp. Printed Article
Vol. 36, 2019 No. 9
2746-2749

Research on Wi-Fi indoor location algorithm based on MD5-KNN

Miao Yunlong1
Lu Yanhui1
Yin Feng2
Yang Shouyi1
1. School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China
2. Shenzhen Institute of Big Data, The Chinese University of Hong Kong, Shenzhen Guangdong 518172, China
DOI: 10.19734/j.issn.1001-3695.2018.03.0178

Abstract

In order to reduce the influence of fingerprint data amount and AP number in the RSSI fingerprint database on the computational efficiency of the KNN algorithm, this paper proposed a Wi-Fi indoor positioning algorithm based on MD5-KNN, which optimized the fingerprint database of large place. In the offline phase, the algorithm converted each fingerprint into a MD5 sequence that included a 32 bit hexadecimal representation. In the online phase, the time it took for the algorithm to locate was linear with the number of APs and did not increase linearly with the number of fingerprints, which reduced the time and calculation amount required for positioning effectively. At the same time, this algorithm calculated the appropriate K adaptively, so as to effectively solve the problem that the RSSI-KNN algorithm needs to manually set the value of K. The experimental results show that the proposed algorithm can effectively improve the positioning accuracy and location efficiency of the indoor positioning technology based on Wi-Fi.

Foundation Support

国家自然科学基金资助项目(61571401,61701426)
河南省技术创新引导专项资助项目(182106000027)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2018.03.0178
Publish at: Application Research of Computers Printed Article, Vol. 36, 2019 No. 9
Section: Technology of Network & Communication
Pages: 2746-2749
Serial Number: 1001-3695(2019)09-041-2746-04

Publish History

[2019-09-05] Printed Article

Cite This Article

苗云龙, 陆彦辉, 尹峰, 等. 基于MD5-KNN的Wi-Fi室内定位算法研究 [J]. 计算机应用研究, 2019, 36 (9): 2746-2749. (Miao Yunlong, Lu Yanhui, Yin Feng, et al. Research on Wi-Fi indoor location algorithm based on MD5-KNN [J]. Application Research of Computers, 2019, 36 (9): 2746-2749. )

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  • Application Research of Computers Monthly Journal
  • Journal ID ISSN 1001-3695
    CN  51-1196/TP

Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

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