전자공학회논문지 (Journal of the Institute of Electronics and Information Engineers)

  • 제51권4호
  • /
  • Pages.27-32
  • /
  • 2014
  • /
  • 2287-5026(pISSN)
  • /
  • 2288-159X(eISSN)
대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지
DOI QR코드

DOI QR Code

광 코드분할다중접속을 위한 단위행렬과 Symmetric Balance Incomplete Block Design 부호를 사용한 2차원 하이브리드 부호

Two-Dimensional Hybrid Codes using Identity Matrix and Symmetric Balance Incomplete Block Design Codes for Optical CDMA

  • 지윤규 (이화여자대학교 전자공학과)
  • Jhee, Yoon Kyoo (Dept. of Electronics Engineering, Ewha Womans University)
  • 투고 : 2013.08.26
  • 심사 : 2014.03.28
  • 발행 : 2014.04.25
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

단위행렬의 각 행을 공간부호로 사용하고 symmetric balance incomplete block design(BIBD) 부호를 스펙트럼부호로 사용한 2차원(2-D) 하이브리드 부호를 제안한다. 단위행렬의 각 행을 공간부호로 사용함으로써 수신기의 구조가 간단해지고 송수신단을 연결하는 방법도 간단해 짐을 알 수 있었다. 또한 비이상적 BIBD 부호를 스펙트럼부호로 사용하여 입력신호가 작을때도 효율적으로 동작할 수 있었다. 사용자 수에 따른 비트 오차율(BER) 분석을 통하여 제안하는 2-D 하이브리드 부호가 1차원(1-D) BIBD 부호에 비하여 최대사용자 수를 현저하게 증가시킬 수 있음을 알 수 있었다.

Two-dimensional hybrid codewords are generated by using each row of identity matrix for spatial encoding and nonideal symmetric balance incomplete block design(BIBD) code for spectral encoding. This spatial/spectral optical code-division multiple-access (OCDMA) network uses single-balanced detectors to abstract the desired information bits and to eliminate the multiple-access interference(MAI). Analytical results show that the number of simultaneous users increases significantly by using the proposed hybrid codes.

키워드

참고문헌

  1. E. Yang, J. Huang and S. Tseng, "Optical CDMA Network Codecs Structured With M-Sequence Codes Over Waveguide-Grating Routers," IEEE Photonics Technology Letters, Vol. 16, no. 2, pp. 641-643, Feb. 2004. https://doi.org/10.1109/LPT.2003.823089
  2. J. Wei and H. Ghafouri-Shiraz, "Codes for Spectral-Amplitude-Coding Optical CDMA Systems," J. of Lightwave Technology, Vol. 20, no. 8, pp. 1284-1291, Aug. 2002. https://doi.org/10.1109/JLT.2002.800301
  3. M. Noshad and K. Jamshidi, "Bounds for the BER of Codes with Fixed Cross Correlation in SAC-OCDMA Systems," J. of Lightwave Technology, Vol. 29, no. 13, pp. 1944-1950, July 2011. https://doi.org/10.1109/JLT.2011.2151251
  4. M. Noshad and K. Jamshidi, "Code Family for Modified Spectral-Amplitude-Coding OCDMA Systems and Performance Analysis," J. of Optical Communication Network, Vol. 2, no. 6, pp. 344-354, June. 2010. https://doi.org/10.1364/JOCN.2.000344
  5. Y. Jhee, "Modified Double Weight Code for Spectral-Amplitude-Coding Optical CDMA," J. of The Institute of Electronics and Information Engineers, Vol. 48, no. 4, pp. 1-5, April 2011.
  6. Y. Jhee, "Spectral Efficiency of Symmetric Balance Incomplete Block Design Code," J. of The Institute of Electronics and Information Engineers, Vol. 50, no. 1, pp. 117-123, Jan. 2013.
  7. C. Lin, J. Wu and C. Yang, "Noncoherent Spatial/Spectral Optical CDMA System With Two-Dimensional Perfect Difference Codes," J. of Lightwave Technology, Vol. 23, no. 12, pp. 3966-3980, April 2005. https://doi.org/10.1109/JLT.2005.859407
  8. M. Yeh, C. Lin and J. Wu, "Noncoherent Spectral/Spatial OCDMA System Using Two-Dimensional Hybrid Codes," J. of Optical Communication Network, Vol. 2, no. 9, pp. 653-661, Sep. 2010. https://doi.org/10.1364/JOCN.2.000653