NDLI: An optical power efficient asymmetrically companded DCO-OFDM for IM/DD systems

Content Provider	IEEE Xplore Digital Library
Author	Barrami, F. Le Guennec, Y. Novakov, E. Busson, P.
Copyright Year	2014
Description	Author affiliation: IMEP-LAHC, Grenoble, France (Le Guennec, Y.; Novakov, E.) \|\| STMircroelectronics Crolles, Crolles, France (Barrami, F.; Busson, P.)
Abstract	Unipolar forms of orthogonal frequency division multiplexing (OFDM) such as DC biased optical OFDM (DCO-OFDM) and asymmetrically clipped optical OFDM (ACO-OFDM) are widely used in intensity-modulated and direct detection (IM/DD) systems. At low data rate, ACO-OFDM is more efficient in terms of optical power but it suffers from spectral inefficiency. For large constellations, DCO-OFDM with large DC bias has more optical power efficiency, since it requires lower constellation size than ACO-OFDM. However, the required DC bias to obtain an acceptable clipping noise degrades the optical power efficiency. To overcome these drawbacks, we propose an optimized DCO-OFDM technique capable to transmit large constellations with a moderate DC bias. To reduce the clipping impact, a linear companding function is used in order to compress the negative part of the bipolar signal and therefore to reduce the amount of the clipped peaks and the loss of information. We demonstrate that the proposed technique has better bit error rate and optical power performances than conventional DCO-OFDM and ACO-OFDM. For a bit rate/normalized bandwidth of 6, a gain of 4dB in optical power is reached.
Starting Page	1
Ending Page	6
File Size	342511
Page Count	6
File Format	PDF
ISBN	9781479952496
DOI	10.1109/WOCC.2014.6839934
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-05-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	IM/DD systems DCO-OFDM OFDM Noise Transforms Optical receivers companding Passive optical networks Optical transmitters optical power Optical OFDM ACO-OFDM Optical noise
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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