Analysis of IM/DD LPO transceivers shows that reducing FEC code rate below KP4 baseline enables PAM-6/8 to meet 200G/400G targets at lower symbol rates than PAM-4 when BSC capacity is used as the achievable rate metric.
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Symbol Rate-Code Rate Trade-offs for IM/DD 200G/400G per Lane LPO Transceivers
Analysis of IM/DD LPO transceivers shows that reducing FEC code rate below KP4 baseline enables PAM-6/8 to meet 200G/400G targets at lower symbol rates than PAM-4 when BSC capacity is used as the achievable rate metric.