Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Thresholding-Based Optimal Detection of Wireless Optical Signals

Not Accessible

Your library or personal account may give you access

Abstract

The receiver design for a high-speed free-space (wireless) optics (FSO) signal is necessarily highly complex when channel state information (CSI) is not available. Currently, although most approaches provide high detection performance in terms of bit error, receiver design is difficult to implement. This paper proposes two practical thresholding-based detection schemes, which offer significant improvement to receiver throughput on a computational load basis when CSI is not available. The first is based on a simple maximum likelihood (ML) function where the bit error rate (BER) is the same as conventional symbol-by-symbol detection. This method, however, causes a loss of BER performance. The second uses the aid of pilot-symbol-assisted modulation (PSAM) to modify the ML function when channel coefficients are temporally correlated. While numerical analysis based on this method shows that the BER performance in a lognormally distributed fading channel is very close to detection achieved with perfect CSI, the receiver suffers from increased complexity. If random processes for fading and noise are assumed as stationary and given that the detection threshold is quickly calculated and applied during a given period, such complexity of PSAM-based and symbol-by-symbol detection methods can be reduced.

© 2010 Optical Society of America

Full Article  |  PDF Article
More Like This
Impact of Link Parameters and Channel Correlation on the Performance of FSO Systems With the Differential Signaling Technique

Mojtaba Mansour Abadi, Zabih Ghassemlooy, Stanislav Zvanovec, Manav R. Bhatnagar, Mohammad-Ali Khalighi, and Yongle Wu
J. Opt. Commun. Netw. 9(2) 138-148 (2017)

Suboptimal maximum likelihood detection of on–off keying for a wireless optical communication system

Ruijie Li, Shengli Ding, and Anhong Dang
J. Opt. Soc. Am. A 34(5) 798-803 (2017)

Adaptive Modulation and Coding for Free-Space Optical Channels

Ivan B. Djordjevic
J. Opt. Commun. Netw. 2(5) 221-229 (2010)

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 Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica 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 Optica member, or as an authorized user of your institution.

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

Tables (1)

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

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

Equations (64)

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

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved