期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 26, 期 22, 页码 2260-2263出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2014.2354458
关键词
Visible light communications; imaging receiver; fisheye lens; multiple-input-multiple-output; spatial diversity
资金
- National Natural Science Foundation of China [61320106001]
- Ministry of Science and Technology, National High Technology Research and Development Program, China [2013AA013602]
- Ministry of Education, Specialized Research Fund for the Doctoral Program of Higher Education, China [20120001110094]
This letter proposes an imaging receiver scheme for an indoor multiple-input-multiple-output (MIMO) visible light communication (VLC), in which a fisheye lens with ultrawide field-of-view is used for high-quality imaging, so it can realize omnidirectional receiving and provide high-spatial diversity for decoding of the MIMO signals. In addition, the fisheye lens projects planar and small-sized images, which means that the integration with compact planar receiver array is feasible. Using the polynomial projection model, the optical intensity on the receiving plane is obtained, which is in accordance with the experimental result and shows that the images of the light-emitting diodes are clearly separated. The simulation results indicate that low correlations of the channel matrix are achieved, so high spectral efficiency is realized with various receiver positions under indoor circumstance. Consequently, this fisheyelens-based imaging receiver is a potential candidate for high-performance indoor MIMO VLC applications.
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