Block code: Difference between revisions

Revision as of 16:16, 2 May 2009

Revision as of 20:50, 11 June 2009

Line 14:

== Information rate ==

When <math>C</math> is a binary block code, consisting of <math>A</math> codewords of length ''n'' bits, then the information[[code rate]] of <math>C</math> is defined as

:<math>\frac{\!log_{2}(A)}{n}</math>.

When if the first ''k'' bits of a codeword are independent information bits, then the informationcode rate is

:<math>\frac{\!log_{2}(2^k)}{n}=\frac{k}{n}</math>.