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Power efficient subcarrier modulation for intensity modulated channels

Johnny Karout (Institutionen för signaler och system, Kommunikationssystem) ; Erik Agrell (Institutionen för signaler och system, Kommunikationssystem) ; Magnus Karlsson (Institutionen för mikroteknologi och nanovetenskap, Fotonik)
Optics Express (1094-4087). Vol. 18 (2010), 17, p. 17913-17921.
[Artikel, refereegranskad vetenskaplig]

We compare formats for optical intensity modulation limited by thermal noise with the assumption of having ideal devices. At the same bitrate and bandwidth, a hitherto unknown format turns out to be more power efficient than known formats. This new modulation, which is a hybrid between on-off keying and phase-shift keying, belongs to the subcarrier modulation family. At asymptotically high signal-to-noise ratios, this hybrid scheme has a 1.2 dB average electrical power gain and 0.6 dB average optical power gain compared to OOK, while it has a 3.0 dB average electrical power gain and 2.1 dB average optical power gain compared to subcarrier QPSK.

Nyckelord: 'Modulation, Intensity Modulation, Subcarrier, Direct detection, phase-shift keying',



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Denna post skapades 2010-08-16. Senast ändrad 2016-04-28.
CPL Pubid: 124592

 

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