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http://dx.doi.org/10.7840/kics.2015.40.10.1871

Transmission Performance Improvement Using Brightness Deviation for Visual-MIMO System  

Kim, Hee-jin (Kookmin University School of Electronics Engineering)
Kwon, Tae-ho (Kookmin University School of Electronics Engineering)
Park, Young-il (Kookmin University School of Electronics Engineering)
Kim, Ki-doo (Kookmin University School of Electronics Engineering)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.40, no.10, 2015 , pp. 1871-1878 More about this Journal
Abstract
Recently, research on the Visual-MIMO by applying the concept of MIMO to communication between the LED array and camera is in progress. Although we already introduced the method for bit decision by using reference LED array pattern, it has the disadvantage of measuring the ISI each time when there is a change in the distance. To overcome this, in this paper, we propose a bit decision and error correction method used by using the luminance deviation without using the reference array pattern. First, we execute the bit decision using experimentally determined threshold. Next, we execute the error checking on the ON-LED and make a correction only if it is found to be error. Correction is determined by using the value of brightness deviation corresponding to the range of 68.2% (1) around the maximum frequency of the histogram for each ON-LED. We verify the performance of the proposed method according to the variation of ISI with distance by using both numerical and experimental analysis.
Keywords
Visual-MIMO; LED array; Camera; Brightness deviation; ISI;
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Times Cited By KSCI : 1  (Citation Analysis)
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