Fan, Yangyu and Green, Roger (2007) Comparison of pulse position modulation and pulse width modulation for application in optical communications. Optical Engineering, Vol.46 (No.6). Article: 065001. doi:10.1117/1.2746010 ISSN 0091-3286.

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Abstract

Different modulation methods for optical wireless have different power and bandwidth efficiencies. Each approach has a direct bearing on the quality and effectiveness of wireless optical communications. As two prime examples, pulse position modulation (PPM) and pulse width modulation (PWM) are compared. The comparison includes the power and bandwidth efficiencies, the power spectrum distribution, and the ability to resist intersymbol interference. Compact system models of multilevel digital PPM (L-PPM), and multilevel digital PWM (L-PWM) are also introduced. The results show that L-PPM has advantages in power efficiency and an approximately uniform spectral distribution, whereas L-PWM has a greater ability to resist intersymbol interference. (c) 2007 Society of Photo-Optical Instrumentation Engineers.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > Engineering
Journal or Publication Title:	Optical Engineering
Publisher:	S P I E - International Society for Optical Engineering
ISSN:	0091-3286
Official Date:	June 2007
Dates:	Date Event June 2007 Published
Volume:	Vol.46
Number:	No.6
Number of Pages:	7
Page Range:	Article: 065001
DOI:	10.1117/1.2746010
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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