On Merits of Spatial Coding in Multilevel Optical Wireless Links

Y. A. Alqudah, M. Kavehrad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


Spatial confinement of paths traveled by infrared signals enables bandwidth and resources reuse in adjacent indoor environments. This property can also result in undesirable shadowing that occurs whenever an obstacle blocks signal paths between transceivers. Shadowing compromises link reliability by increasing error rate, and can result in service interruption. In this paper, we propose spatial coding to improve link performance and alleviate shadowing effect in Multi Spot Diffusing, a Multi-input, Multi-Output architecture. Spatial coding performance is compared to receiver multi-level combining. Our results show that when a channel is shadowed, 4-level combining at receiver fails to maintain a reliable link irrespective of transmitted power. Using spatial coding over 6 channels, a reliable link is possible in presence of a shadowed channel with an optical power penalty of 4.5 dB.

Original languageEnglish (US)
Title of host publicationGLOBECOM - IEEE Global Telecommunications Conference
Number of pages5
StatePublished - 2003
EventIEEE Global Telecommunications Conference GLOBECOM'03 - San Francisco, CA, United States
Duration: Dec 1 2003Dec 5 2003


OtherIEEE Global Telecommunications Conference GLOBECOM'03
Country/TerritoryUnited States
CitySan Francisco, CA

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Global and Planetary Change


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