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The electromagnetic interference (EMI) caused by alternating current driven LEDs which are widely used as indicator lamps in power strip is presented. The frequency-domain measurement results show that the EMI will violate the MIL-461E/RE102 standard limit line in the electromagnetic compatibility anechoic chamber. The time-domain measurement results show that the breakdown of LEDs suddenly increase...
Colour shift keying (CSK) can achieve significant performance gains in multi-colour visible light communications (VLCs). Existing CSK constellations are designed within the positive domain which satisfies the requirement of non-negative optical intensity modulations. A scheme is proposed to incorporate spatial modulation with a CSK design by grouping LEDs. In this way, the CSK constellation is optimised...
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