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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 30, Iss. 10 — May. 15, 2012
  • pp: 1549–1558

Study of a Diversity O-CDMA Scheme for Optical Wireless

Chung-Yu Chang, Guu-Chang Yang, Cheng-Yuan Chang, and Wing C. Kwong

Journal of Lightwave Technology, Vol. 30, Issue 10, pp. 1549-1558 (2012)


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Abstract

Borrowing from wireless communications, a “diversity” optical code-division multiple-access (O-CDMA) scheme for optical wireless is studied in this paper. The scheme transmits multiple copies of an optical code per data bit of one for improving code performance and spectral efficiency. An approximate performance-analytical model is also formulated for quick computation and comparison with a conventional O-CDMA scheme. Under the assumptions of same code power and hardware complexity, our study finds an important application of the diversity scheme, which circumvents a heavy code-weight requirement (for achieving good code performance) in conventional O-CDMA by transmitting multiple copies of lower weight codes with little penalty in spectral efficiency and without depletion in code cardinality (i.e., the number of possible subscribers.)

© 2012 IEEE

Citation
Chung-Yu Chang, Guu-Chang Yang, Cheng-Yuan Chang, and Wing C. Kwong, "Study of a Diversity O-CDMA Scheme for Optical Wireless," J. Lightwave Technol. 30, 1549-1558 (2012)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-30-10-1549


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