Performance analysis of direct-detection optical asynchronous CDMA systems with double optical hard-limiters

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91 Citations (Scopus)

Abstract

Performance of optical asynchronous code-division multiple-access (CDMA) systems with double optical hard-limiters is analyzed under the assumption of Poisson shot noise model for the receiver photodetector where the noise due to the detector dark currents exists. Optical orthogonal codes (OOC's) are employed as signature sequence codes. In the analysis, chips are assumed to be synchronous among users, that is, the chip synchronous case, because the effect of the interference is largest in the chip synchronous case and thus the performance in the chip synchronous case results in the upper bounds on the performance of the asynchronous system. The performance is evaluated under average power and bit rate constraints. The results show that, differing from the optical synchronous CDMA systems with double optical hard-limiters, the optical asynchronous CDMA systems with double optical hard-limiters have good performance even when the number of simultaneous users is large.

Original languageEnglish
Pages (from-to)452-457
Number of pages6
JournalJournal of Lightwave Technology
Volume15
Issue number3
DOIs
Publication statusPublished - 1997 Mar 1
Externally publishedYes

Keywords

  • Channel interference
  • Double optical hard-limiters
  • Optical asynchronous CDMA

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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