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  • Received: Apr. 30, 2008

    Accepted: --

    Posted: Mar. 20, 2009

    Published Online: Mar. 20, 2009

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    Hui Yan, Kun Qiu, Yun Ling. Spectral efficiency analysis of OCDMA systems[J]. Chinese Optics Letters, 2009, 7(3): 183

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Chinese Optics Letters, Vol. 7, Issue 3, 183 (2009)

Spectral efficiency analysis of OCDMA systems

Hui Yan, Kun Qiu, and Yun Ling

Author Affiliations

  • Key Lab of Broadband Optical Fiber Communication and Communication Networks Technology, University of Electronic Science and Technology of China, Chengdu 610054

Abstract

2 We discuss several kinds of code schemes and analyze their spectral efficiency, code utilizing efficiency, and the maximal spectral efficiency. Error correction coding is used to increase the spectral efficiency, and it can avoid the spectral decrease with the increase of the length. The extended primer code (EPC) has the highest spectral efficiency in the unipolar code system. The bipolar code system has larger spectral efficiency than unipolar code system, but has lower code utilizing efficiency and the maximal spectral efficiency. From the numerical results, we can see that the spectral efficiency increases by 0.025 (b/s)/Hz when the bit error rate (BER) increases from 10^{-1} to 10^{-7}.

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