Overview
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Channel coding is the technique of processing the original data in such a way that it can recover from noise in the channel. The best channel coding methods create data streams that approach the Shannon limit of the channel with minimal error probabilities. This decreased error probability for a given rate less than the Shannon limit comes at the expense of coding complexity at the transmitter and decoding at the receiver. Alternatively, relatively simple codes can achieve vanishingly small error probabilities by consuming large amounts of bandwidth. The code rate of any channel coding technique, denoted Rc, is the ratio of pre-coded, k, to post-coded, n, data lengths, or Rc = k/n. It is less than one for simple, inefficient coding techniques, and approaches 1 for more efficient codes.
Exercise
Download the attached file and open the Channel_Coding_Golay VI.
