Title :
Block transmission with linear frequency domain equalization for dispersive optical channels with direct detection
Author :
Wolf, Mike ; Grobe, Liane ; Rieche, Marie Ruth ; Koher, Andreas ; Vucic, Jelena
Author_Institution :
Commun. Res. Lab., Ilmenau Univ. of Technol., Ilmenau, Germany
Abstract :
Block transmission with frequency-domain equalization (FDE) has been proven as an attractive alternative to orthogonal frequency division multiplex (OFDM) for radio frequency (RF) communication, especially at 60 GHz. In this paper, we show that FDE can be advantageously applied for optical transmission over dispersive channels as well, and in particular, in direct-detection systems. We review the optimal coefficients for zero forcing (ZF) and minimum mean square error (MMSE) equalization - both in the case of symbol-spaced and fractionally-spaced sampling, and present promising results for an illustrative visible-light communications (VLC) link based on non-return-to-zero (NRZ) on-off keying (OOK).
Keywords :
amplitude shift keying; equalisers; least mean squares methods; optical links; telecommunication channels; block transmission; direct-detection systems; dispersive optical channels; fractional-spaced sampling; frequency 60 GHz; linear frequency domain equalization; minimum mean square error equalization; nonreturn-to-zero on-off keying; orthogonal frequency division multiplex; radiofrequency communication; symbol-spaced sampling; visible-light communication link; zero forcing; Bandwidth; Dispersion; Frequency domain analysis; Mean square error methods; OFDM modulation; Optical distortion; Optical filters; Optical modulation; Optical sensors; Radio frequency; fractionally-spaced equalization; frequency-domain equalization; minimum mean square error; optical communication; symbol-spaced equalization; zero forcing;
Conference_Titel :
Transparent Optical Networks (ICTON), 2010 12th International Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-7799-9
Electronic_ISBN :
978-1-4244-7797-5
DOI :
10.1109/ICTON.2010.5549129
