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Demonstration of the Merit and Limitation of Generalised Space Shift Keying for Indoor Visible Light Communications

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)1960-1965
Number of pages6
JournalJournal of Lightwave Technology
Issue number10
Publication statusPublished - 15 May 2014


This paper demonstrates the merit and de-merit of a low complexity, multiple transmitter generalised space shift keying (GSSK) signalling technique for short range indoor visible light communications. To illustrate the high spectral efficiency credential of GSSK, an array of N-t white light emitting diodes (LEDs) is used to demonstrate N-t bits/symbol transmission by exploiting the natural differences in the channel gains of the spatially separated LED array. With two low power white LEDs each having a 3 dB modulation bandwidth of 8 MHz, data transmission of up to 40 Mbits/s (20 Mbaud) is demonstrated. For an average received electrical signal power of -12.5 dBm and 2 x 10(4) data symbols, the measured symbol error rate at 20 Mbaud is 7 x 10(-2) and 5 x 10(-5) at 10 Mbaud (20 Mbits/s) without any error control coding. The GSSK technique is experimentally shown to be most suitable for a fixed configuration as its performance is quite sensitive to receiver mobility.

    Research areas

  • Generalised space shift keying (GSSK), optical wireless, spatial modulation (SM), visible light communications (VLC)

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