24 Papers
129 Citations
Qing Li is an academic researcher from Beijing University of Posts and Telecommunications. The author has contributed to research in topics: Communications system & Visible light communication. The author has an hindex of 7, co-authored 23 publications. Previous affiliations of Qing Li include Peking University.
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Papers
An indoor visible light communication positioning system using dual-tone multi-frequency technique
Pengfei Luo,Min Zhang,Xiang Zhang,Guangming Cai,Dahai Han,Qing Li +5 more
- 01 Oct 2013
TL;DR: A visible light communication (VLC)-based indoor positioning system (IPS) and algorithm using dual-tone multi-frequency (DTMF) technique that does not need clock synchronization to separate signals from different time slots is proposed.
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Patent
Visible light communication-based broadband access device and method
Han Dahai,Yile Liu,Zhang Min,Jiao Lu,Qing Li +4 more
- 05 Dec 2012
TL;DR: In this paper, a visible light communication-based broadband access device and a method is described. But the authors focus on the technical field of the visible light communications, and do not discuss the application of the system in the Internet.
23
Patent
Visible light communication-based indoor positioning system and method
Zhang Min,Han Dahai,Pengfei Luo,Zhang Xiang,Qing Li,Li Zhuang +5 more
- 18 Jun 2014
TL;DR: In this paper, a visible light communication-based indoor positioning system and method is proposed for solving the problems of high hardware cost, more system maintenance expense and the like of the existing indoor positioning systems and method.
21
Research on channel-related polar code with an optimum code length for wireless ultraviolet communications
TL;DR: Numerical simulations and off-line experimental investigations validate the proposed polar coding scheme, which can effectively combat path loss induced performance deterioration with a relatively low computational complexity.
16
Patent
Visible-light diversity-reception method and system
Han Dahai,Wang Xufeng,Zhang Min,Jiao Lu,Qing Li,Zhang Xiang +5 more
- 25 Dec 2013
TL;DR: In this article, a visible-light diversity-reception method and system is proposed, which includes: carrying out diversity reception on visible light signals through a plurality of photoelectric detectors and converting the visible-lights signals into electrical signals; carrying out A/D conversion on the diversityreception electrical signals of different circuits through an A-D conversion circuit; and combining the signals, which undergo the filtering, on the different circuits.
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