The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

Design of a new family of multi wavelength two-dimensional codes for optical code division multiple access networks

다파장 OCDMA 네트웍에서의 새로운 2차원 코드의 설계

  • 유경식 (서울대학교 광통신시스템 연구실) ;
  • 박남규 (서울대학교 광통신시스템 연구실)
  • Published : 2000.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

It has been known that the optical code division multiple access (OCDMA) is a prominent future technology to support many simultaneous users and to increase transmission capacity of optical fiber. In this paper, we proposed the new construction of 2 dimensional code, which can be used as a codeword in temporal/wavelength OCDMA networks. New code family is obtained by extending the concept of Hamming correlation. All optical encoder and decoder for newly proposed code were also developed. In considering bit error ratio, we verified that new coding scheme outperforms conventional coding scheme by simulation. This system is applicable to asynchronous fast local area network, which needs a high security level and a flexible network configuration.

본 논문에서는 광 코드 분할 다중화방식 (OCDMA)에서 사용할 수 있는 ‘파장’과 ‘시간’영역에서는 준 직교 성질을 가지는 다파장 2 차원 코드의 구성 방법을 새로이 제안하였다. ‘파장’과‘시간’영역에서 직교 특성을 가지는 다파장 OCDMA 방삭은 동시 사용자의 수나 오류 확률 등의 여러 측면에서 기존이 다중 사용자 접속 방식에 비해 우수한 성능을 보인다. 특히, 새로 제안된 코드는 브래그 격자를 이용한 광학적 신호 처리 기법으로 생성, 해독 될 수 있어 전기적 신호 처리로 인한 병목 현상을 줄일 수 있는 장점을 가지고 있다.

Keywords

References

  1. J. Lightwave Technol. v.4 Spread spectrum fiber-optic local area network using optical processing P. R. Pruncal;M. A. Santoro;T. R. Fan
  2. IEICE Trans. Com. v.E79-B High-speed optical networks suing code-division multiple-access for future real-time computer communications J. G. Zhang
  3. IEEE Trans. Commun. v.37 Code division multiple-access techniques in optical fiber networks - Part I : Fundamental principles J. A. Salehi
  4. IEEE Trans. Commun. v.37 Code division multiple-access techniques in optical fiber networks - Part II : System performance analysis J. A. Salehi(et al.)
  5. IEEE Trans. Inform. Theory v.35 Optical orthogonal codes: Design, analysis, and applications F. R. K. Chung;J. A. Salehi;V. K. Wei
  6. IEEE Photon, Technol. Lett. v.4 Temporal/spatial optical CDMA networks-design, demonstration, and comparion with temporal networks E. Park;A. J. Mendez;E. Garmire
  7. J. Lightwave Technol. v.16 no.4 Design of a new family of two-dimensional codes for fiber-optic CDMA networks E. S. Shivaleela(et al.)
  8. Electron. Lett. v.30 no.17 Wavelength hopping/time spreading code division multple access systems L. Tancevski;I. Andonovic
  9. IEEE Trans. Commun. v.45 no.11 Performace comparison of multiwavelength CDMA and WDMA+CDMA for fiber-optic networks G. C. Yang;W. C. Kwong
  10. IEEE Trans. Inform. Theory v.41 no.1 Optical orthogonal codes with unequal auto- and cross- correlation constraints G. C. Yang;T. E. Fuja
  11. IEEE Trans. Commun. v.30 Theory of spread-spectrum communications-A tutorial R. L. Pickholtz;D. L. Schilling;L. B. Milstein
  12. IEEE Trans. Inform. Theory. v.20 no.1 Families of sequences with optimal Hamming correlation properties A. Lempel;H. Greenberger
  13. IEEE Trans. Microwave Theory Technol. v.33 Optical fiber delay line signal processing K. P. Jackson(et al.)
  14. IEEE Trans. Commun. v.40 no.7 Optical CDMA via temporal codes M. Azizoglu;J. A. Salehi;Y. Li
  15. Proc. IEEE v.64 no.12 Pseudo-random sequences and arrays F. J. Macwilliams;N. J. A. Sloane
  16. IEEE Trans. Commun. v.39 no.11 Performance comparison of asynchronous and synchrounou code-division multiple-access techniques for fiber-optic local area network W. C. Kwong;P. A. Perrier;P. R. Pruncal