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Wireless optical CDMA LAN: digital design concepts

Ghaffari, B. M ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1109/TCOMM.2008.060495
  3. Publisher: 2008
  4. Abstract:
  5. In this paper we study and present an in-depth analysis on the operability and the viability of a typical wireless optical CDMA (OCDMA) local area network. Three receiver structures for OCDMA systems, using optical orthogonal codes (OOC) with minimum auto and cross-correlations as signature sequence, namely, correlation, correlation with hard-limiter, and chip-level detection are studied and proposed for such a network. For the synchronization circuit design the performance of two algorithms for OOC based OCDMA networks, namely, simple serial-search and multiple-shift in the context of wireless OCDMA LAN are studied. Furthermore, we study a synchronization method based on matched filtering and show that it presents a much better performance in our wireless OCDMA system. The effect of sampling rate and its performance on tracking circuit is analyzed. Bit-error-rate (BER) analysis is performed by photon counting methodology. Multi-user interference (MUI), ambient light, and photodetector dark current are considered in our analysis. Our analysis strongly indicates the viability and practicality of such systems in certain important wireless optical communications systems. © 2008 IEEE
  6. Keywords:
  7. Bit error rate ; Code division multiple access ; Electric network analysis ; Electronic circuit tracking ; Integrated circuit manufacture ; Local area networks ; Mergers and acquisitions ; Optical communication ; Optical correlation ; Optoelectronic devices ; Synchronization ; Wireless local area networks (WLAN) ; Acquisition ; OCDMA ; Optical orthogonal codes ; Sampling effect ; Tracking ; Wireless optical LAN ; Wireless networks
  8. Source: IEEE Transactions on Communications ; Volume 56, Issue 12 , 2008 , Pages 2145-2155 ; 00906778 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/4711178