Module EC-23

Error-Control Coding and Receiver Signal Processing

The part of a digital link that sits between a demodulated symbol and a correct message. Why redundancy added on purpose buys reliability that more power cannot, the block and convolutional families and how each is decoded, the modern codes that come within a fraction of the theoretical limit and are used in every recent standard, and the three things a receiver must work out for itself before any of it applies: what the channel did to the signal, how to undo it, and where the symbols actually begin.