Rotated Color Shift Keying for Visible Light Communications With Signal-Dependent Noise

This letter proposes three distinct modulation schemes belonging to the class of rotated color-shift keying (CSK) to improve the performance of regular CSK over a tricolor visible light communications (VLC) channel subject to signal-dependent noise (SDN). In such channels, regular CSK schemes suffer...

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Bibliographic Details
Published inIEEE communications letters Vol. 24; no. 4; pp. 844 - 848
Main Authors Gao, Qian, Qaraqe, Khalid, Serpedin, Erchin
Format Journal Article
LanguageEnglish
Published New York IEEE 01.04.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Color
Constellations
Distortion
Energy efficiency
Image color analysis
Keying
Lighting
Modulation
Multidimensional signal processing
Optical distortion
Performance enhancement
Rotation
Visible light communication
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Summary:This letter proposes three distinct modulation schemes belonging to the class of rotated color-shift keying (CSK) to improve the performance of regular CSK over a tricolor visible light communications (VLC) channel subject to signal-dependent noise (SDN). In such channels, regular CSK schemes suffer from a severe constellation distortion. The proposed rotated CSK schemes termed respectively separative whitening-like rotation (SWR), multiplicative whitening-like rotation (MWR), and additive whitening-like rotation (AWR), provide error rate gains relative to the regular CSK. The proposed modulations are carried out by employing practical lighting constraints, including a relaxed color constraint by the MacAdam ellipses with appropriate steps.
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ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2020.2967377