Abstract

This paper proposes a new channel interference cancellation technique using interference estimation and double optical hardlimiters (DHLs) for direct-detection optical code-division multiple-access systems. In the proposed system, when the output of the DHL is"0,"the proposed system outputs"0."When the output of the DHL is"1,"the proposed system reconstructs the interference and estimates whether the output"1"is owing to the interference or the transmitted signal. It is shown that the proposed system is effective to reduce the effects of the channel interference. Moreover,it is shown that the proposed system can improve the error floor of the systems with DHL.

© 2003 IEEE

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J. Lightwave Technol.

Other

W. C. Kwong, P. A. Perrier and P. R. Prucnal, "Performance comparison of asynchronous and synchronous code-division multiple-access techniques for fiber-optic local area networks", in IEEE Trans. Commun., vol. 39, Nov. 1991, pp. 1625-1634.

F. R. K. Chung, J. A. Salehi and V. K. Wei, "Optical orthogonal codes: design, analysis and applications", IEEE Trans. Inform. Theory, vol. 35, pp. 595-604, May 1989.

P. W. Smith, E. H. Turner and P. J. Maloney, "Electrooptic nonlinear Fabry-Perot devices", IEEE J. Quantum Electron., vol. QE-14, pp. 207-212, Mar. 1978 .

I. C. Khoo, A. Diaz, M. V. Wood and P. H. Chen, "Passive optical limiting of picosecond-nanosecond laser pulses using highly nonlinear organic liquid cored fiber array", IEEE J. Quantum Electron., vol. 7, pp. 760-768, Sept.-Oct. 2001.

I. C. Khoo, M. Wood and B. D. Guenther, "Nonlinear liquid crystal optical fiber array for all-optical switching/limiting", in LEOS'96, vol. 2, Nov. 1996, pp. 18-21.

J. A. Salehi, "Code division multiple-access techniques in optical fiber networks-part I: Fundamental principles", IEEE Trans. Commun. , vol. 37, pp. 824-833, Aug. 1989.

J. A. Salehi and C. A. Brackett, "Code division multiple-access techniques in optical fiber networks-part II: Systems performance analysis", IEEE Trans. Commun., vol. 37, pp. 834-842, Aug. 1989.

K. Sato, T. Ohtsuki, H. Uehara and I. Sasase, "Performance of optical direct-detection CDMA systems using prime sequence codes", in Proc. ICC'95, Seattle, WA, June 1995, pp. 1312-1316.

T. Ohtsuki, I. Sasase and S. Mori, "Effects of hard-limiter and error correction coding on performance of direct-detection optical CDMA systems with PPM Signaling", in Proc. ICC'95, Seattle, WA, June 1995, pp. 1307-1311.

K. Kitayama, H. Sotobayashi and N. Wada, "Optical code division multiplexing (OCDM) and its application to photonic networks", IEICE Trans. Fundamentals , vol. E82-A, pp. 2616-2626, Dec. 1999.

T. Ohtsuki, K. Sato, I. Sasase and S. Mori, "Direct-detection optical synchronous CDMA systems with double optical hard-limiters using modified prime sequence codes", in IEEE J. Select. Areas Commun., vol. 14, Dec. 1996, pp. 1879-1887.

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