@article{3036369, title = "Rate-adaptive DFT-spread DMT and CDMA-DMT for 1-mm SI-POF short-range links", author = "Pikasis, E. and Karabetsos, S. and Nikas, T. and Syvridis, D.", journal = "IEEE Photonics Technology Letters", year = "2013", volume = "25", number = "16", pages = "1574-1577", issn = "1041-1135", doi = "10.1109/LPT.2013.2271324", keywords = "Bit loading; DFT-spread; Discrete multi-tone; DMT; MC-CDMA; Multi carrier; SI-POF, Code division multiple access; Discrete Fourier transforms; Multicarrier modulation; Plastic optical fibers, Loading", abstract = "In this letter, rate-adaptive bit-loading techniques are explored for maximizing the transmission rate of spreading multicarrier modulation schemes over step index plastic optical fiber (SI-POF) short range transmission links. Both the discrete Fourier transform (DFT)-spread discrete multitone (DMT) and code division multiple access-DMT are experimentally evaluated and compared against conventional rate adaptive DMT, over a 50-m intensity modulation direct-detection (IM/DD) link of 1-mm PMMA SI-POF. It is shown that both schemes achieve better performance than DMT, whereas DFT-spread DMT behaves best among them, over the same experimental setup. © 1989-2012 IEEE." }