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Simple Viterbi-decoded convolutional codes are now giving way to [[turbo code]]s, a new class of iterated short convolutional codes that closely approach the theoretical limits imposed by [[Shannon's theorem]] with much less decoding complexity than the Viterbi algorithm on the long convolutional codes that would be required for the same performance.
Turbo codes have not yet been concatenated with solid (low complexity) [[Reed-Solomon error correction]] codes. However, in the interest of planetary exploration this may someday be done.
==External Links==
*[http://complextoreal.com/chapters/convo.pdf Tutorial on Convolutional Coding and Decoding]
[[Category:Error detection and correction]]
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