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Evaluates LED half-power angle effects on VN-CodeSK transmission efficiency, suggesting enhanced uniformity.
This paper focuses on a variable N-parallel code shift keying (VN-CodeSK) system using a (2, 2) threshold secret sharing (TSS) scheme with a frame structure. The relationship between the LED’s half-power angle and the transmission efficiency is evaluated in overlapping illumination areas and throughout the entire room. As a result, increasing the LED’s half-power angle improves the transmission efficiency throughout the entire room. This is considered to contribute to the uniformity of the lighting function.
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Yada et al. (2026) studied this question.
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