Performance comparison between spatial multiplexing and spatial modulation in indoor MIMO visible light communication systems

Cuiwei He, Thomas Q. Wang, Jean Armstrong

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

14 Citations (Scopus)


Spatial multiplexing (SMP) and optical spatial modulation (OSM) are two important technologies for indoor multiple-input multiple-output (MIMO) visible light communications (VLC). In this paper, we compare the performance of SMP and OSM systems which are operated with typical configurations in an indoor scenario. Both systems transmit data using asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) as the modulation scheme. It is shown that in order to achieve the same data rate with the SMP, the OSM has to employ large constellations which become impractical when either the number of luminaires or the constellation size of the SMP is greater than four. Simulation results are presented for both MIMO systems using four luminaires as transmitters and a receiver configured with three different front-ends. These receivers include a conventional non-imaging receiver, a prism-based receiver and an aperture-based receiver. The BER results demonstrate that SMP outperforms OSM in terms of both the size of the region in which a receiver can achieve low BER and the BER at typical receiver positions.

Original languageEnglish
Title of host publication2016 IEEE International Conference on Communications (ICC 2016)
Subtitle of host publicationKuala Lumpur, Malaysia, 22-27 May, 2016
EditorsStefano Bregni, Nelson Fonseca
Place of PublicationPiscataway, NJ
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9781479966646
ISBN (Print)9781479966653
Publication statusPublished - 12 Jul 2016
EventIEEE International Conference on Communications 2016: Communications for All Things - Kuala Lumpur, Malaysia
Duration: 22 May 201627 May 2016 (IEEE Conference Proceedings)


ConferenceIEEE International Conference on Communications 2016
Abbreviated titleICC 2016
CityKuala Lumpur
OtherConveniently located in the middle of South-East Asia, ICC2016 will feature a comprehensive Technical Program including 13 Symposia and a number of Tutorials and Workshops. IEEE ICC 2016 - Communications for All Things will also include an attractive Industry Forum & Exhibition Program featuring keynote speakers, business and industry panels, and vendor exhibits.
Internet address


  • asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM)
  • multiple-input multiple-output (MIMO)
  • optical spatial modulation (OSM)
  • spatial multiplexing (SMP)
  • visible light communications (VLC)
  • zero-forcing (ZF)

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