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 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 is set to 0.45 and 0.4, respectively.
© 2016 Optical Society of America
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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://opg.optica.org/ol/abstract.cfm?uri=ol-41-22-5417
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