Abstract

Since energy dissipation and latency in optical interconnects are of utmost concern, such links are often operated without forward error correction. We propose a low-complexity noniterative two-error correcting Bose–Chaudhuri–Hocquenghem (BCH) decoder circuit that significantly relaxes the stringent optical modulation amplitude requirements on the transmitter, which help to reduce laser and laser driver energy dissipation. We demonstrate, in a 28-nm CMOS process technology, that the introduction of this BCH circuit in an uncoded link leads to energy-per-bit reductions of 25%, even when the impact of code rate on receiver energy dissipation is considered.

© 2017 IEEE

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