Multirate RZ communications for dispersive wireless optical channels

Belal Hamzeh, Mohsen Kavehrad

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

1 Scopus citations


Free Space Optical Communications through cloud-obscured channels suffer from severe degradations due to multiscattering, which induces delay spread in the received signal. The delay spread of FSO channel can vary considerably according to channel conditions, varying from nanoseconds to microseconds for clear and cloudy channel, respectively. In this paper, we present the use of retum-to-zero (RZ) modulation in conjunction with multirate modulation schemes as viable means for minimizing the dispersive effects of the channels. We show that multirate communications provide diversity against channel degradation and fluctuation, while RZ modulation is more robust to dispersive channels than non return-to-zero (NRZ) modulation, thus providing an overall improvement in system performance, reliability and availability.

Original languageEnglish (US)
Title of host publicationWireless Sensing and Processing
StatePublished - 2006
EventWireless Sensing and Processing - Kissimmee, FL, United States
Duration: Apr 17 2006Apr 18 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherWireless Sensing and Processing
Country/TerritoryUnited States
CityKissimmee, FL

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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