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

The Institute of Electronics and Information Engineers (대한전자공학회)
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Two-Dimensional Hybrid Codes using Identity Matrix and Symmetric Balance Incomplete Block Design Codes for Optical CDMA

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

  • Jhee, Yoon Kyoo (Dept. of Electronics Engineering, Ewha Womans University)
  • 지윤규 (이화여자대학교 전자공학과)
  • Received : 2013.08.26
  • Accepted : 2014.03.28
  • Published : 2014.04.25
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Abstract

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.

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.

Keywords

References

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