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Quantitative Finance · Glossary

What is Forward error correction?

Definition 13.3 Networks, Hardware and Trading Infrastructure · Chapter 13 — Long-Haul Fibre

Forward error correction (FEC) adds redundant bits to a transmitted signal so that the receiver can correct errors without asking for a retransmission; its decoder must collect a block (or an interleaved group of blocks) before it can correct it, which adds a delay at the receiving end.

A long-haul fibre route, schematically: terminals at each end (transponders and forward error correction), spans of glass with an amplifier at the end of each, and, on routes that compensate dispersion optically, a spool of dispersion-compensating fibre (DCF) in each span. firm.fibreroute charges each piece its time.
Figure 13.1. A long-haul fibre route, schematically: terminals at each end (transponders and forward error correction), spans of glass with an amplifier at the end of each, and, on routes that compensate dispersion optically, a spool of dispersion-compensating fibre (DCF) in each span. firm.fibreroute charges each piece its time.
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