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In this paper, a pilot-based blind (PBB) phase estimation method for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) is proposed. Instead of inserting the pilot-subcarriers that are loaded with the already known information in the OFDM signal, the unknown and specially designed signal is used to replace the signal on the pilot subcarriers to decrease the waste of spectrum and...
We propose a novel guard-band-shared direct detection scheme to improve the receiver spectrum efficiency. A 100-Gb/s DDO-OFDM/OQAM signal transmission has been successfully demonstrated over 80-km SSMF using a single photodiode within 50-GHz optical grid.
We experimentally demonstrate a 470.4-Gb/s superchannels consisting of 16 × 29.4-Gb/s densely-spaced OFDM/OQAM transmission over 2400-km SSMF with a novel alternative signals PAPR reduction scheme. With the nonlinearity improvement, an improvement of about 1 dB in Q factor and 1.5 dB in launch power over conventional OFDM/OQAM.
We experimentally demonstrated a 429.96-Gb/s OFDM/OQAM-64QAM transmission over 400-km standard single mode fiber on the 50 GHz ITU-T grid. The spectral efficiency is as high as 8.63 bit/s/Hz.
We proposed a novel approach to receive multi-band 100-Gb/s direct-detection optical OFDM/OQAM signal with only one conventional 40-GHz photodiode. The transmission reach over SSMF is up to 320 km.
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