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Internally channel-coded framed time-hopping fiber-optic CDMA communications

Azmi, P ; Sharif University Of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/JLT.2005.856233
  3. Abstract:
  4. Due to the low cardinality of optical orthogonal codes (OOCs) with a correlation value of 1, the capability of an internal channel-coding scheme cannot be applied effectively for an increasing number of simultaneous users in a typical fiber-optic code division multiple-access (FO-CDMA) system. In this paper, we consider applying the internal channel-coding scheme to the framed time-hopping (FTH) FO-CDMA system. Due to the extremely high cardinality of the spreading sequence in FTH FO-CDMA, the technique highlights the ability of the internal channel-coding scheme to increase the effective number of users in an FO-CDMA system. For the FTH FO-CDMA system, we only consider a Poisson noise-limited channel and do not take into account the physical fiber-optic channel impairments. Our simulation and analytical results show that, due to the large cardinality of spreading codes, the capability of the internal channel-coding technique to increase the maximum number of simultaneous users becomes more obvious in the FTH FO-CDMA system
  5. Keywords:
  6. Fiber-optic code-division multiple access (FO-CDMA) ; Frame time-hopping (FTH) ; Internal channel-coding scheme ; Optical code-division multiple access (CDMA) ; Optical orthogonal codes (OOCs)
  7. Source: IEEE/OSA Journal of Lightwave Technology ; Vol.23, No.11, PP. 3702-3707, Nov. 2005
  8. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=1561399&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F50%2F33146%2F01561399