A Two-Dimensional Signal Space for Intensity-Modulated Channels

Author

Karout, Johnny ; Kramer, Gerhard ; Kschischang, Frank R. ; Agrell, Erik

Author_Institution

Dept. of Signals & Syst., Chalmers Univ. of Technol., Gothenburg, Sweden

Volume

16

Issue

9

fYear

2012

fDate

9/1/2012 12:00:00 AM

Firstpage

1361

Lastpage

1364

Abstract

A two-dimensional signal space for intensity-modulated channels is presented. Modulation formats using this signal space are designed to minimize average and peak power for a fixed minimum distance between signal points. The uncoded, high-signal-to-noise ratio, power and spectral efficiencies are compared to those of the best known formats. The new formats are simpler than existing subcarrier formats, and are superior if the bandwidth is measured as 90% in-band power. Existing subcarrier formats are better if the bandwidth is measured as 99% in-band power.

Keywords

optical modulation; signal processing; high-signal-to-noise ratio; intensity-modulated channels; modulation formats; peak power; power efficiencies; spectral efficiencies; subcarrier formats; two-dimensional signal space; uncoded; Adaptive optics; Bandwidth; Gain; Optical fiber communication; Optical modulation; Optical receivers; Direct detection; intensity modulation; noncoherent communications; power efficiency; spectral efficiency;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.072012.121057

Filename

6249703