Abstract

With the development of phase encoding technologies, beat noise becomes one of the most predominant limitations of optical code division multiaccess (OCDMA) systems. In order to analyze beat noises' impact more accurately, a non-Gaussian analysis with consideration of a decision variable's moment generation function is first introduced in this paper to evaluate both the multiaccess interference and the beat noises simultaneously, where prime, secondary, and partial coherent beat noises are discussed in detail. In this paper, the saddle-point approximation (SPA) method is first utilized to investigate beat noise's impact on an OCDMA system. Comparison of probability density functions as well as bit error rates between the proposed method and the traditional Gaussian approximation method is given here. The resultant achievement shows the outstanding performance of SPA on this occasion, which proves the necessity of such a moment generation function-based non-Gaussian analysis.

© 2006 IEEE

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  1. P. R. Prucnal, M. A. Santoro, T. R. Fan, "Spread spectrum fiber-optic local area network using optical processing," J. Lightw. Technol. LT-4, 547-554 (1986).
  2. J. A. Salehi, C. A. Brackett, "Code division multiple-access technique in optical fiber networks, Part I: Fundamental principals," IEEE Trans. Commun. 37, 824-833 (1989).
  3. M. E. Maric, "Coherent optical CDMA networks," J. Lightw. Technol. 11, 854-864 (1993).
  4. W. Cong, R. P. Scott, V. J. Hernandez, K. Li, B. H. Kolner, J. P. Heritage, S. J. B. Yoo, "Demonstration of a 610 Gb/s multiusertime-slotted SPECTS O-CDMA network testbed," Optical Fiber Commun./Nat. Fiber Optic Engineers Conf. (OFC/NFOEC) AnaheimCA (2005) Paper OFA5.
  5. T. Pu, Y. Li, S. Yang, "Research of algebra congruent codes used in 2D OCDMA system," J. Lightw. Technol. 21, 2557-2564 (2003).
  6. Y. Dai, X. Chen, D. Jiang, S. Xie, C. Fan, "Equivalent phase shift in a fiber bragg grating achieved by changing the sampling period," IEEE Photon. Technol. Lett. 16, 2284-2286 (2004).
  7. X. Wang, "High reflectivity superstructured FBG for coherent optical code generation and recognition," Opt. Express 12, 5457-5468 (2004).
  8. N. Wada, K. Kitayama, "A 10 Gb/s optical code division multiplexing using 8-chip optical bipolar code and coherent detection," J. Lightw. Technol. 17, 1758-1765 (1999).
  9. E. D. J. Smith, P. T. Gough, D. P. Taylor, "Noise limits of optical spectral-encoding CDMA systems," Electron. Lett. 31, 1469-1470 (1995).
  10. L. Tancevski, L. A. Rusch, "Impact of the beat noise on the performance of 2-D optical CDMA systems," IEEE Commun. Lett. 4, 264-266 (2000).
  11. T. Demeechai, A. B. Sharma, "Beat noise in a non-coherent optical CDMA system," Proc. ICCS (2002) pp. 899-902.
  12. X. Wang, K.-I. Kitayama, "Analysis of beat noise in coherent and incoherent time-spreading OCDMA," J. Ligthw. Technol. 22, 2226-2236 (2004).
  13. T. Ohtsuki, K. Sato, I. Sasase, S. Mori, "Direct-detection optical synchronous CDMA systems with double optical hard-limiters using modified prime sequence codes," IEEE J. Sel. Areas Commun. 14, 1879-1887 (1996).
  14. T. K. Tang, K. B. Letaief, "Bit-error rate computation of optical CDMA communication system by large deviations theory," IEEE Trans. Commun. 46, 1422-1428 (1998).
  15. G. Elinarsson, Principles of Lightwave Communications (Wiley, 1996).

Electron. Lett. (1)

E. D. J. Smith, P. T. Gough, D. P. Taylor, "Noise limits of optical spectral-encoding CDMA systems," Electron. Lett. 31, 1469-1470 (1995).

IEEE Commun. Lett. (1)

L. Tancevski, L. A. Rusch, "Impact of the beat noise on the performance of 2-D optical CDMA systems," IEEE Commun. Lett. 4, 264-266 (2000).

IEEE J. Sel. Areas Commun. (1)

T. Ohtsuki, K. Sato, I. Sasase, S. Mori, "Direct-detection optical synchronous CDMA systems with double optical hard-limiters using modified prime sequence codes," IEEE J. Sel. Areas Commun. 14, 1879-1887 (1996).

IEEE Photon. Technol. Lett. (1)

Y. Dai, X. Chen, D. Jiang, S. Xie, C. Fan, "Equivalent phase shift in a fiber bragg grating achieved by changing the sampling period," IEEE Photon. Technol. Lett. 16, 2284-2286 (2004).

IEEE Trans. Commun. (2)

T. K. Tang, K. B. Letaief, "Bit-error rate computation of optical CDMA communication system by large deviations theory," IEEE Trans. Commun. 46, 1422-1428 (1998).

J. A. Salehi, C. A. Brackett, "Code division multiple-access technique in optical fiber networks, Part I: Fundamental principals," IEEE Trans. Commun. 37, 824-833 (1989).

J. Lightw. Technol. (4)

M. E. Maric, "Coherent optical CDMA networks," J. Lightw. Technol. 11, 854-864 (1993).

N. Wada, K. Kitayama, "A 10 Gb/s optical code division multiplexing using 8-chip optical bipolar code and coherent detection," J. Lightw. Technol. 17, 1758-1765 (1999).

P. R. Prucnal, M. A. Santoro, T. R. Fan, "Spread spectrum fiber-optic local area network using optical processing," J. Lightw. Technol. LT-4, 547-554 (1986).

T. Pu, Y. Li, S. Yang, "Research of algebra congruent codes used in 2D OCDMA system," J. Lightw. Technol. 21, 2557-2564 (2003).

J. Ligthw. Technol. (1)

X. Wang, K.-I. Kitayama, "Analysis of beat noise in coherent and incoherent time-spreading OCDMA," J. Ligthw. Technol. 22, 2226-2236 (2004).

Opt. Express (1)

Other (3)

T. Demeechai, A. B. Sharma, "Beat noise in a non-coherent optical CDMA system," Proc. ICCS (2002) pp. 899-902.

W. Cong, R. P. Scott, V. J. Hernandez, K. Li, B. H. Kolner, J. P. Heritage, S. J. B. Yoo, "Demonstration of a 610 Gb/s multiusertime-slotted SPECTS O-CDMA network testbed," Optical Fiber Commun./Nat. Fiber Optic Engineers Conf. (OFC/NFOEC) AnaheimCA (2005) Paper OFA5.

G. Elinarsson, Principles of Lightwave Communications (Wiley, 1996).

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