Convolutional code: Difference between revisions

Revision as of 15:09, 13 May 2006

Revision as of 15:09, 13 May 2006

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One can see that a data sequence being encoded is here a part of the output (encoded) sequence too (look at the output 2). Such codes are referred to as ''systematic'' and others are called ''non-systematic''.

Recursive codes are almost always systematic and, conversely, non-recursive codes are non-systematic. It isn't a strict requirement, but a common practisepractice.

===Impulse response, transfer function and constraint length===