Direct-detection optical synchronous CDMA systems with double optical hard-limiters using modified prime sequence codes

Tomoaki Ohtsuki, Kazumi Sato, Iwao Sasase, Shinsaku Mori

研究成果: Article

65 引用 (Scopus)

抄録

An optical code-division multiple-access (CDMA) system with double optical hard-limiters is proposed where the optical hard-limiters are placed before and after an optical correlator. Moreover, the effect of the optical hard-limiter on the performance of the optical synchronous CDMA systems using modified prime sequence codes as signature codes is analyzed under the assumption of Poisson shot noise model for the receiver photodetector where the noise due to the detector dark currents exists. We evaluate the performance under average power and bit rate constraints. Our results show that using the single optical hard-limiter slightly degrades the performance of the optical CDMA systems under the assumption of Poisson shot noise model for the receiver photodetector where the noise due to the detector dark currents exists. Moreover, we show that the optical CDMA systems with double optical hard-limiters have better performance than other conventional CDMA systems with and without the optical hard-limiter when the number of simultaneous users is not so large.

元の言語English
ページ(範囲)1879-1887
ページ数9
ジャーナルIEEE Journal on Selected Areas in Communications
14
発行部数9
DOI
出版物ステータスPublished - 1996 12

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Limiters
Code division multiple access
Shot noise
Dark currents
Photodetectors
Detectors
Correlators

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

これを引用

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