OCDMA-coded free-space optical links for wireless optical-mesh networks

B. Hamzeh, M. Kavehrad

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We propose a wireless optical-mesh network based on optical code-division multiple-access (OCDMA)-coded free-space optical links. The performance of the proposed network under intermediate and strong turbulence channel conditions is investigated for synchronous and asynchronous OCDMA. We show that synchronous OCDMA using complementary Walsh-Hadamard codes operating at a raw bit rate of 622 Mb/s per user can achieve a bit-error rate of 10-9. This is achievable in channels with strong turbulence and high temporal correlation, or in channels with intermediate turbulence conditions; reasonable conditions based on channel characteristics inferred from the refractive index spectrum. For asynchronous OCDMA using optical orthogonal codes (OOCs), using a lower bound, we show that asynchronous OCDMA using OOCs cannot achieve acceptable performance for the same channel conditions, due to interference limitations.

Original languageEnglish (US)
Pages (from-to)2165-2174
Number of pages10
JournalIEEE Transactions on Communications
Issue number12
StatePublished - Dec 2004

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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