Reduction of optical beat interference in optical frequency-hopping CDMA networks using coherence multiplexing

K. Kamakura, I. Sasase

研究成果: Conference article査読

4 被引用数 (Scopus)

抄録

In order to reduce the optical beat interference (OBI) in an optical frequency-hopping code division multiple access (FH-CDMA) network, we propose applying coherence multiplexing (CM) technique into the optical FH-CDMA network. Since the CM technique achieves multiplexing by using time delays exceeding the coherence time of the light sources, crosstalk between CM channels depends on a space of delay difference between CM channels. We analyze the ratio of crosstalk to signal as a function of the space, and find a channel space enough to neglect crosstalk from other CM channels. Using this channel space, we obtain the number of CM channels accommodated within one chip duration. Since the conventional FH-CDMA supports traffic by the code channels only, its capacity is limited by OBI as traffic increases. In addition to the code channel, the proposed network supports traffic by the CM channels. Since the addition of CM channels decreases the number of active code channels for uniform traffic, OBI is reduced. Numerical results show that the proposed network attains larger capacity than the conventional FH-CDMA.

本文言語English
ページ(範囲)695-700
ページ数6
ジャーナルIEEE International Conference on Communications
3
出版ステータスPublished - 2001 1 1
イベントInternational Conference on Communications (ICC2001) - Helsinki, Finland
継続期間: 2000 6 112000 6 14

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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