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

K. Kamakura, Iwao Sasase

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications
Pages695-700
Number of pages6
Volume3
Publication statusPublished - 2001
EventInternational Conference on Communications (ICC2001) - Helsinki, Finland
Duration: 2000 Jun 112000 Jun 14

Other

OtherInternational Conference on Communications (ICC2001)
CountryFinland
CityHelsinki
Period00/6/1100/6/14

Fingerprint

Light interference
Frequency hopping
Multiplexing
Code division multiple access
Crosstalk
Telecommunication traffic
Light sources
Time delay

ASJC Scopus subject areas

  • Media Technology

Cite this

Kamakura, K., & Sasase, I. (2001). Reduction of optical beat interference in optical frequency-hopping CDMA networks using coherence multiplexing. In IEEE International Conference on Communications (Vol. 3, pp. 695-700)

Reduction of optical beat interference in optical frequency-hopping CDMA networks using coherence multiplexing. / Kamakura, K.; Sasase, Iwao.

IEEE International Conference on Communications. Vol. 3 2001. p. 695-700.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kamakura, K & Sasase, I 2001, Reduction of optical beat interference in optical frequency-hopping CDMA networks using coherence multiplexing. in IEEE International Conference on Communications. vol. 3, pp. 695-700, International Conference on Communications (ICC2001), Helsinki, Finland, 00/6/11.
Kamakura K, Sasase I. Reduction of optical beat interference in optical frequency-hopping CDMA networks using coherence multiplexing. In IEEE International Conference on Communications. Vol. 3. 2001. p. 695-700
Kamakura, K. ; Sasase, Iwao. / Reduction of optical beat interference in optical frequency-hopping CDMA networks using coherence multiplexing. IEEE International Conference on Communications. Vol. 3 2001. pp. 695-700
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