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- W2810826072 abstract "A simplified maximum likelihood sequence estimation (MLSE) based on Viterbi algorithm has been proposed. Experimental results show that compared with the conventional MLSE, the proposed algorithm saves the multiplication by 25% with no sensitivity penalty when the memory length of MLSE is 2 both in the 25 Gb/s nonreturn to zero and 50 Gb/s four-level pulse-amplitude modulation (PAM-4) transmission systems. In order to further reduce the number of multiplications in the 50 Gb/s PAM-4 transmission system, we use 75 taps of feed-forward equalization to equalize the received PAM-4 signal into duo-binary PAM-4 (DB-PAM-4) signal and then use MLSE with the memory length of 1 to decode, which improves the sensitivity performance by 1.8 dB and reduces the computing complexity by ∼98% compared with conventional MLSE (L = 4) method. As a result, a 10-km C-band transmission of 50 Gb/s PAM-4 signal is achieved using optical transceivers with a combined 3-dB bandwidth of ∼8 GHz, and only 107 multiplications are required by using our proposed simplified algorithm for equalization." @default.
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- W2810826072 date "2018-08-01" @default.
- W2810826072 modified "2023-10-15" @default.
- W2810826072 title "Decoding of 10-G Optics-Based 50-Gb/s PAM-4 Signal Using Simplified MLSE" @default.
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- W2810826072 doi "https://doi.org/10.1109/jphot.2018.2850778" @default.
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