Abstract
We propose an asymmetrically clipped optical fast orthogonal frequency-division multiplexing (ACO-FOFDM) based on discrete cosine transform for intensity-modulated and direct-detection systems. We demonstrate that the asymmetrically clipped technique can be applied to FOFDM, and derive a statistical characterization of clipped FOFDM. The key parameters of ACO-FOFDM, including spectral efficiency, complexity, bit-error-rate (BER) performance, and power efficiency, are analyzed. Compared with ACO-OFDM based on fast Fourier transform, for the same spectral efficiency, ACO-FOFDM has the same power efficiency and BER performance but a lower computational complexity for digital signal processing. Compared with pulse-amplitude modulation (PAM) and DC-biased optical FOFDM (DCO-FOFDM), ACO-FOFDM offers superior power efficiency for a bit rate/normalized bandwidth of less than 5. When the bit rate/normalized bandwidth is 2, the required ratio of optical energy per bit to a single-sided noise power spectral density (
$E_{b(opt)}/N_{0}$
) for a BER of
$10^{-3}$
in ACO-FOFDM is approximately 5 dB less than that in PAM or in DCO-FOFDM with a 7-dB DC bias. Moreover, ACO-FOFDM is more cost effective and better suited to adaptive systems because no DC bias is needed. Finally, we demonstrate a transmission experiment using a 50-km standard single-mode fiber to verify the feasibility of ACO-FOFDM.
© 2015 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Add to BibSonomy