Information rate

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The information rate (also code rate or simply rate ) is a term used in coding theory .

The rate of a block code of length over alphabet , called the per code word transmitted information symbols relative to the length of the words:

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The following applies here: the encoded data contain more redundancy than the uncoded data, i.e. contain additional symbols. The redundancy is analogous . In the case of linear codes , the code has exactly the elements. Their rate is therefore the quotient of the dimension of the code and the length of the words: