Digital modulation techniques for optical asymmetrically-clipped OFDM

Sarah Kate Wilson, Jean Armstrong

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

14 Citations (Scopus)


We present a new modulation scheme for asymmetrically-clipped optical OFDM (ACO-OFDM). We show that a generic bit-loading scheme that puts more bits on the low-frequency subcarriers is more efficient for wireless optical channels than the constant modulation scheme typically used in radio frequency (RF) OFDM schemes. We discuss the lowpass nature of the wireless optical channel that motivates the use of this generic bit-loading scheme. This scheme performs significantly better than the traditional constant modulation on all tones in a variety of channels. The average Bit-error rate (BER) curves for the new modulation scheme have up to a 5 dB improvement for Signal-to-Noise Ratios where the BER is in the order of 10 -3 .

Original languageEnglish
Title of host publicationWCNC 2008 - IEEE Wireless Communications and Networking Conference, Conference Proceedings
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages5
ISBN (Print)9781424419968
Publication statusPublished - 18 Sept 2008
EventIEEE Wireless Communications and Networking Conference 2008 - Las Vegas Convention Center, Las Vegas, United States of America
Duration: 31 Mar 20083 Apr 2008 (Proceedings)

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511


ConferenceIEEE Wireless Communications and Networking Conference 2008
Abbreviated titleWCNC 2008
Country/TerritoryUnited States of America
CityLas Vegas
Internet address

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