Title :
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
fDate :
9/1/2012 12:00:00 AM
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;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.072012.121057
