Closed-form suboptimal maximum-likelihood sequence detection for free-space optical communications

Lu Zhang; Zhiyong Wu

doi:10.1364/AO.51.006441

Closed-form suboptimal maximum-likelihood sequence detection for free-space optical communications

Lu Zhang and Zhiyong Wu

Applied Optics
Vol. 51,
Issue 27,
pp. 6441-6447
(2012)
•doi: 10.1364/AO.51.006441

Get Citation
Copy Citation Text
Lu Zhang and Zhiyong Wu, "Closed-form suboptimal maximum-likelihood sequence detection for free-space optical communications," Appl. Opt. 51, 6441-6447 (2012)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Get PDF (374 KB)
Set citation alerts
Save article

Not Accessible

Your account may give you access

Abstract

In this paper, a closed-form suboptimal maximum-likelihood sequence detection (MLSD) metric and its low-complexity version are proposed for free space optical communications systems operating over lognormal fading and high signal-to-noise channel. This algorithm provides a simplification to the algorithm reported by Riediger et al. In comparison, firstly, the parameters of this algorithm are independent of the scintillation index’s variation, and secondly this algorithm just contains conventional computations; it saves computational time significantly. Bit error rate performance results confirm that the proposed algorithm performs comparably well as optimal MLSD. Moreover, the low-complexity version of this algorithm consumes much less time than the previously suboptimal MLSD metric presented by Riediger et al.

Full Article | PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (15)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

	$S.I. = 0.25$	$S.I. = 0.5$	$S.I. = 0.75$
$T_{Opt . MLSD} (s)$	66.7673	66.6949	66.9350
$T_{Subopt . MLSDo} (s)$	19.723	18.5767	18.6394
$T_{Subopt . MLSDfc} (s)$	0.3513	0.3514	0.3516
$T_{Opt . MLSD} / T_{Subopt . MLSDfc}$	190.06	189.80	190.37
$T_{Subopt . MLSDo} / T_{Subpt . MLSDfc}$	56.14	52.87	53.01

	$S.I. = 0.25$	$S.I. = 0.5$	$S.I. = 0.75$
$T_{Opt . MLSD}$	4.371 ms	4.236 ms	4.403 ms
$T_{Subopt . MLSDo}$	1.061 ms	0.997 ms	1.014 ms
$T_{Subopt . MLSDfc}$	13.996 us	13.931 us	14.025 us

	$S.I. = 0.25$	$S.I. = 0.5$	$S.I. = 0.75$
$T_{Opt . MLSD} (s)$	66.7673	66.6949	66.9350
$T_{Subopt . MLSDo} (s)$	19.723	18.5767	18.6394
$T_{Subopt . MLSDfc} (s)$	0.3513	0.3514	0.3516
$T_{Opt . MLSD} / T_{Subopt . MLSDfc}$	190.06	189.80	190.37
$T_{Subopt . MLSDo} / T_{Subpt . MLSDfc}$	56.14	52.87	53.01

	$S.I. = 0.25$	$S.I. = 0.5$	$S.I. = 0.75$
$T_{Opt . MLSD}$	4.371 ms	4.236 ms	4.403 ms
$T_{Subopt . MLSDo}$	1.061 ms	0.997 ms	1.014 ms
$T_{Subopt . MLSDfc}$	13.996 us	13.931 us	14.025 us

Abstract

References

Cited By

Figures (7)

Tables (2)

Equations (15)

Metrics

Login or Create Account