Effect of thermal noise and APD noise on the performance of OPPM-CDMA receivers

The effect of thermal noise and avalanche-photodiode (APD) noise on the performance of optical overlapping pulse-position modulation/code-division multiple-access (OPPM-CDMA) systems with and without double optical hardlimiters is examined. Comparisons with the corresponding optical on-off keying/CDMA (OOK-CDMA) systems are presented as well. The maximum data rate that can be achieved under laser pulsewidth and bit error rate constraints is determined. It is shown that about 10 dB increase in the average power, with respect to the Poisson shot-noise-limited system, is required to compensate for the performance degradation due to thermal noise and APD noise. Moreover, it is indicated that for a bit error rate not exceeding 10/sup -9/, a laser pulsewidth of 0.03 ns, and an average received optical power of -55 dBm, a data rate of more than 3 Gb/s can be achieved per channel when using OPPM-CDMA systems with double optical hardlimiters.

[1]  Israel Bar-David,et al.  Information rates of photon-limited overlapping pulse position modulation channels , 1984, IEEE Trans. Inf. Theory.

[2]  Paul R. Prucnal,et al.  Ultrafast All-Optical Synchronous Multiple Access Fiber Networks , 1986, IEEE J. Sel. Areas Commun..

[3]  Fan Chung Graham,et al.  Optical orthogonal codes: Design, analysis, and applications , 1989, IEEE Trans. Inf. Theory.

[4]  Hyuck M. Kwon.  Optical orthogonal code-division multiple-access system .II. Multibits/sequence-period OOCDMA , 1994, IEEE Trans. Commun..

[5]  Hossam M. H. Shalaby,et al.  Chip-level detection in optical code division multiple access , 1998 .

[6]  Jawad A. Salehi,et al.  Code division multiple-access techniques in optical fiber networks. I. Fundamental principles , 1989, IEEE Trans. Commun..

[7]  Hossam M. H. Shalaby.  Direct detection optical overlapping PPM-CDMA communication systems with double optical hardlimiters , 1999 .

[8]  Jawad A. Salehi,et al.  Code division multiple-access techniques in optical fiber networks. II. Systems performance analysis , 1989, IEEE Trans. Commun..

[9]  Tomoaki Ohtsuki.  Direct-detection optical asynchronous CDMA systems with double optical hard-limiters: APD noise and thermal noise , 1998, IEEE GLOBECOM 1998 (Cat. NO. 98CH36250).

[10]  Hyuck M. Kwon,et al.  Optical orthogonal code-division multiple-access system .I. APD noise and thermal noise , 1994, IEEE Trans. Commun..

[11]  Tomoaki Ohtsuki,et al.  Performance analysis of direct-detection optical asynchronous CDMA systems with double optical hard-limiters , 1997, Proceedings of ICC'97 - International Conference on Communications.

[12]  I. Sasase,et al.  Direct-Detection Optical Synchronous CDMA Systems with Double Optical Hard-Limiters Using Modified Prime Sequence Codes , 1996, IEEE J. Sel. Areas Commun..

[13]  Hossam M. H. Shalaby,et al.  Performance analysis of optical synchronous CDMA communication systems with PPM signaling , 1995, IEEE Trans. Commun..

[14]  Hossam M. H. Shalaby.  A performance analysis of optical overlapping PPM-CDMA communication systems , 1999 .

[15]  Hossam M. H. Shalaby.  Maximum achievable throughputs for uncoded OPPM and MPPM in optical direct-detection channels , 1995 .

[16]  Costas N. Georghiades.  Modulation and coding for throughput-efficient optical systems , 1994, IEEE Trans. Inf. Theory.

[17]  Costas N. Georghiades.  Some implications of TCM for optical direct-detection channels , 1989, IEEE Trans. Commun..

[18]  J. R. Clark.  Optical communications , 1977, Proceedings of the IEEE.

[19]  G. Lee,et al.  Optical Pulse Position Modulation with Multiple Positions per Pulsewidth , 1977, IEEE Trans. Commun..

[20]  I. Sasase,et al.  Overlapping multi-pulse pulse position modulation in optical direct detection channel , 1993, Proceedings of ICC '93 - IEEE International Conference on Communications.

[21]  H. Vincent Poor,et al.  Performance of multiuser detection for optical CDMA. I. Error probabilities , 1995, IEEE Trans. Commun..