Capacity Analysis of M-PAM Inverse Source Coding in Visible Light Communications

Author

Ahn, Kang-Il ; Kwon, Jae Kyun

Author_Institution

LED-IT Fusion Technol. Res. Center, Yeungnam Univ., Gyeongsan, South Korea

Volume

30

Issue

10

fYear

2012

fDate

5/15/2012 12:00:00 AM

Firstpage

1399

Lastpage

1404

Abstract

We previously proposed inverse source coding (ISC) to maximize the transmission rate in visible light communications with dimming capability using ON-OFF keying. First, this paper extends the proposed ISC approach to -ary pulse amplitude modulation and obtains the optimal probability distributions. Then, dimming capacity is used to compare the existing analog dimming approach, the extended ISC approach, and the hybrid of these approaches. We conclude that ISC is the best approach, and threshold values for adaptive modulation are derived depending on signal quality and dimming target.

Keywords

adaptive modulation; optical communication; pulse amplitude modulation; source coding; M-PAM inverse source coding; M-ary pulse amplitude modulation; ON-OFF keying; adaptive modulation; analog dimming approach; capacity analysis; dimming capacity; dimming target; extended ISC approach; optimal probability distributions; signal quality; threshold values; visible light communications; Constellation diagram; Educational institutions; Entropy; Equations; Pulse width modulation; Source coding; $M$-ary pulse amplitude modulation (M-PAM); Dimming capacity; dimming coding; inverse source coding (ISC); visible light communication (VLC);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2012.2185780

Filename

6141997