Abstract

In this Letter, we propose, to the best of our knowledge, the first faster-than-Nyquist non-orthogonal frequency-division multiplexing based on fractional Hartley transform (FrHT). Different from the existing NOFDM signal, the real-valued FrHT-based NOFDM signal can be directly applied to an intensity-modulated/direct-detection optical system without upconversion, and it can achieve a transmission rate faster than the Nyquist rate, which is the up limit of orthogonal frequency-division multiplexing. For example, when bandwidth compression factor α is set to 0.4, the transmission rate is 20 percent faster than the Nyquist rate. Furthermore, we demonstrate simulations and experiments to verify the feasibility of FrHT-based NOFDM. After a 25 km standard single-mode fiber transmission, the bit error rate of FrHT-based DC-offset NOFDM can achieve a 7% and 20% forward error correction limit when α is set to 0.45 and 0.4, respectively.

© 2016 Optical Society of America

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Corrections

Ji Zhou, Yaojun Qiao, Zhanyu Yang, and Erkun Sun, "Faster-than-Nyquist non-orthogonal frequency-division multiplexing based on fractional Hartley transform: erratum," Opt. Lett. 41, 5417-5417 (2016)
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-41-22-5417

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