Abstract

In this paper, we present a novel multirate, differentiated quality of service (QoS) optical CDMA (OCDMA) system using multilevel signaling technique. The emphasis is on OCDMA systems employing multi-length variable-weight optical orthogonal codes (MLVW-OOC) as signature sequence. We begin by presenting a two-class variable-weight OCDMA system in which all users have the same energy level in one bit duration. As a consequence, high weight users transmit their corresponding optical pulses at a lower power while low weight users transmit their corresponding optical pulses at a higher power level. We show that using this multilevel signaling technique, while employing the well known optical AND logic gate receiver structure, we achieve a considerable improvement in the performance of low-weight (high-power) users while the performance of high-weight (low-power) users not altered in comparison to one-level system. In the next step, we indicate that by using the recently introduced multistage receiver structure, which employs advanced optical logic gate elements, interferences at different power levels are distinguishable so that the performance of both high-weight and low-weight users are improved. Furthermore, we employ multilevel signaling technique in OCDMA system based on MLVW-OOC (multirate, differentiated QoS system). We show that using multilevel signaling technique in such a system results to the performance improvement. To analyze the performance of the system we obtain a closed-form relation expressing an upper bound on the probability of error of the system. Finally, to validate the upper bound, the analytical results are compared to the results of system simulation. The numerical closeness between the analytical and system simulation reveals the tightness of the obtained upper bound, hence making them quite useful in evaluating the above system's performance.

© 2009 IEEE

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  1. B. M. Ghaffari, J. A. Salehi, "Multiclass, multistage, and multilevel fiber-optic CDMA signaling techniques based on advanced binary optical logic gate elements," IEEE Trans. Commun. 57, 1424-1432 (2009).
  2. J. A. Salehi, "Code division multiple-access techniques in optical fiber networks—Part I: Fundamental principles," IEEE Trans. Commun. 37, 824-833 (1989).
  3. J. A. Salehi, C. A. Brackett, "Code division multiple-access techniques in optical fiber networks—Part II: System performance analysis," IEEE Trans. Commun. 37, 834-842 (1989).
  4. F. R. A. Chung, J. A. Salehi, V. K. Wei, "Optical orthogonal codes: Design, analysis, and application," IEEE Trans. Inf. Theory 35, 595-604 (1989).
  5. S. Mashhadi, J. A. Salehi, "Code division multiple-access techniques in optical fiber networks—Part III: Optical AND gate receiver structure with generalized optical orthogonal codes," IEEE Trans. Commun. 45, 1457-1468 (2006).
  6. W. C. Kwong, G.-C. Yang, "Design of multi-length optical orthogonal codes for optical CDMA multimedia networks," IEEE Trans. Commun. 50, 1258-1265 (2006).
  7. J. Y. Lin, J. S. Jhou, J. H. Wen, "Variable-length code construction for incoherent optical CDMA systems," Opt. Fiber Technol. 13, 180-190 (2007).
  8. G.-C. Yang, "Variable-weight optical orthogonal codes for CDMA network with multiple performance requirements," IEEE Trans. Commun. 44, 47-55 (1996).
  9. F. R. Gu, J. Wu, "Construction and performance analysis of variable-weight optical orthogonal codes for asynchronous optical CDMA systems," J. Lightw. Technol. 23, 740-748 (2005).
  10. N. G. Tarhuni, T. O. Korhonen, E. Mutafungwa, M. S. Elmusrati, "Multiclass optical orthogonal codes for multiservice optical CDMA networks," J. Lightw. Technol. 24, 694-704 (2006).
  11. Nasaruddin, T. Tsujioka, "Multiple-length variable-weight optical orthogonal codes for supporting multirate multimedia services in optical CDMA networks," IEICE Trans. Commun. E90-B, (2007).
  12. W. C. Kwong, G.-C. Yang, "Multiple-length extended carrier-hopping prime codes for optical CDMA systems supporting multirate, multimedia services," J. Lightw. Technol. 23, 3652-3662 (2005).
  13. W. C. Kwong, G.-C. Yang, "Multiple-length, multiple-wavelength optical orthogonal codes for optical CDMA systems supporting multirate, multimedia services," IEEE J. Select. Areas Commun. 22, 1640-1647 (2004).
  14. V. Baby, W. C. Kwong, C.-Y. Chang, G.-C. Yang, P. R. Prucnal, "Performance analysis of variable-weight multilength optical codes for wavelength-time O-CDMA multimedia systems," IEEE Trans. Commun. 55, 1325-1333 (2007).
  15. A. Sawchuk, T. C. Strand, "Digital optical computing," IEEE Proc. 72, 758-779 (1984).
  16. L. Brzozowski, E. H. Sargent, "All-optical analog-to-digital converters, hard limiters and logic gates," J. Lightw. Technol. 19, 114-119 (2001).

2009 (1)

B. M. Ghaffari, J. A. Salehi, "Multiclass, multistage, and multilevel fiber-optic CDMA signaling techniques based on advanced binary optical logic gate elements," IEEE Trans. Commun. 57, 1424-1432 (2009).

2007 (3)

J. Y. Lin, J. S. Jhou, J. H. Wen, "Variable-length code construction for incoherent optical CDMA systems," Opt. Fiber Technol. 13, 180-190 (2007).

Nasaruddin, T. Tsujioka, "Multiple-length variable-weight optical orthogonal codes for supporting multirate multimedia services in optical CDMA networks," IEICE Trans. Commun. E90-B, (2007).

V. Baby, W. C. Kwong, C.-Y. Chang, G.-C. Yang, P. R. Prucnal, "Performance analysis of variable-weight multilength optical codes for wavelength-time O-CDMA multimedia systems," IEEE Trans. Commun. 55, 1325-1333 (2007).

2006 (3)

N. G. Tarhuni, T. O. Korhonen, E. Mutafungwa, M. S. Elmusrati, "Multiclass optical orthogonal codes for multiservice optical CDMA networks," J. Lightw. Technol. 24, 694-704 (2006).

S. Mashhadi, J. A. Salehi, "Code division multiple-access techniques in optical fiber networks—Part III: Optical AND gate receiver structure with generalized optical orthogonal codes," IEEE Trans. Commun. 45, 1457-1468 (2006).

W. C. Kwong, G.-C. Yang, "Design of multi-length optical orthogonal codes for optical CDMA multimedia networks," IEEE Trans. Commun. 50, 1258-1265 (2006).

2005 (2)

F. R. Gu, J. Wu, "Construction and performance analysis of variable-weight optical orthogonal codes for asynchronous optical CDMA systems," J. Lightw. Technol. 23, 740-748 (2005).

W. C. Kwong, G.-C. Yang, "Multiple-length extended carrier-hopping prime codes for optical CDMA systems supporting multirate, multimedia services," J. Lightw. Technol. 23, 3652-3662 (2005).

2004 (1)

W. C. Kwong, G.-C. Yang, "Multiple-length, multiple-wavelength optical orthogonal codes for optical CDMA systems supporting multirate, multimedia services," IEEE J. Select. Areas Commun. 22, 1640-1647 (2004).

2001 (1)

L. Brzozowski, E. H. Sargent, "All-optical analog-to-digital converters, hard limiters and logic gates," J. Lightw. Technol. 19, 114-119 (2001).

1996 (1)

G.-C. Yang, "Variable-weight optical orthogonal codes for CDMA network with multiple performance requirements," IEEE Trans. Commun. 44, 47-55 (1996).

1989 (3)

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

J. A. Salehi, C. A. Brackett, "Code division multiple-access techniques in optical fiber networks—Part II: System performance analysis," IEEE Trans. Commun. 37, 834-842 (1989).

F. R. A. Chung, J. A. Salehi, V. K. Wei, "Optical orthogonal codes: Design, analysis, and application," IEEE Trans. Inf. Theory 35, 595-604 (1989).

1984 (1)

A. Sawchuk, T. C. Strand, "Digital optical computing," IEEE Proc. 72, 758-779 (1984).

IEEE Trans. Commun. (2)

S. Mashhadi, J. A. Salehi, "Code division multiple-access techniques in optical fiber networks—Part III: Optical AND gate receiver structure with generalized optical orthogonal codes," IEEE Trans. Commun. 45, 1457-1468 (2006).

W. C. Kwong, G.-C. Yang, "Design of multi-length optical orthogonal codes for optical CDMA multimedia networks," IEEE Trans. Commun. 50, 1258-1265 (2006).

IEEE J. Select. Areas Commun. (1)

W. C. Kwong, G.-C. Yang, "Multiple-length, multiple-wavelength optical orthogonal codes for optical CDMA systems supporting multirate, multimedia services," IEEE J. Select. Areas Commun. 22, 1640-1647 (2004).

IEEE Proc. (1)

A. Sawchuk, T. C. Strand, "Digital optical computing," IEEE Proc. 72, 758-779 (1984).

IEEE Trans. Commun. (5)

V. Baby, W. C. Kwong, C.-Y. Chang, G.-C. Yang, P. R. Prucnal, "Performance analysis of variable-weight multilength optical codes for wavelength-time O-CDMA multimedia systems," IEEE Trans. Commun. 55, 1325-1333 (2007).

G.-C. Yang, "Variable-weight optical orthogonal codes for CDMA network with multiple performance requirements," IEEE Trans. Commun. 44, 47-55 (1996).

B. M. Ghaffari, J. A. Salehi, "Multiclass, multistage, and multilevel fiber-optic CDMA signaling techniques based on advanced binary optical logic gate elements," IEEE Trans. Commun. 57, 1424-1432 (2009).

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

J. A. Salehi, C. A. Brackett, "Code division multiple-access techniques in optical fiber networks—Part II: System performance analysis," IEEE Trans. Commun. 37, 834-842 (1989).

IEEE Trans. Inf. Theory (1)

F. R. A. Chung, J. A. Salehi, V. K. Wei, "Optical orthogonal codes: Design, analysis, and application," IEEE Trans. Inf. Theory 35, 595-604 (1989).

IEICE Trans. Commun. (1)

Nasaruddin, T. Tsujioka, "Multiple-length variable-weight optical orthogonal codes for supporting multirate multimedia services in optical CDMA networks," IEICE Trans. Commun. E90-B, (2007).

J. Lightw. Technol. (2)

L. Brzozowski, E. H. Sargent, "All-optical analog-to-digital converters, hard limiters and logic gates," J. Lightw. Technol. 19, 114-119 (2001).

N. G. Tarhuni, T. O. Korhonen, E. Mutafungwa, M. S. Elmusrati, "Multiclass optical orthogonal codes for multiservice optical CDMA networks," J. Lightw. Technol. 24, 694-704 (2006).

J. Lightw. Technol. (2)

W. C. Kwong, G.-C. Yang, "Multiple-length extended carrier-hopping prime codes for optical CDMA systems supporting multirate, multimedia services," J. Lightw. Technol. 23, 3652-3662 (2005).

F. R. Gu, J. Wu, "Construction and performance analysis of variable-weight optical orthogonal codes for asynchronous optical CDMA systems," J. Lightw. Technol. 23, 740-748 (2005).

Opt. Fiber Technol. (1)

J. Y. Lin, J. S. Jhou, J. H. Wen, "Variable-length code construction for incoherent optical CDMA systems," Opt. Fiber Technol. 13, 180-190 (2007).

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