Block code: Difference between revisions

Revision as of 22:43, 17 January 2007

Revision as of 22:43, 17 January 2007

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==Information rate==

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

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

When f.i. the first ''k'' bits of a codeword are independent informationbits, then the information rate is

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

[[Category:Coding theory]]