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Performance degradation due to OFDM-UWB radio signals transmission along dispersive single-mode fiber

Alves , T. M. F. ; Cartaxo, A.

IEEE Photonics Technology Letters Vol. 21, Nº 3, pp. 158 - 160, February, 2009.

ISSN (print): 1041-1135
ISSN (online): 1041-1135

Journal Impact Factor: 2,110 (in 2014)

Digital Object Identifier: 10.1109/LPT.2008.2009231

Abstract
The performance degradation of orthogonal frequency
division multiplexing (OFDM) ultra-wide band (UWB)
radio signals caused by transmission along dispersive singlemode
fiber is assessed theoretically and by numerical simulation.
It is shown that the performance degradation of OFDM-UWB
signals caused by fiber dispersion is due to the power fading
induced on the sub-carrier showing stronger fading. Results
show that the power fading description based on a small signal
analysis provides good estimates of the optical signal-to-noise
ratio degradation for OFDM-UWB signals with modulation index
(defined as the ratio between the root mean square voltage of the
OFDM-UWB signal and the bias voltage of the Mach-Zehnder
modulator) values up to 18%. This is a pessimistic value for some
OFDM-UWB carrier frequencies.