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New asymptotic lower bounds on the free distance for time-constant convolutional codes. (English. Russian original) Zbl 0603.94014
Probl. Inf. Transm. 22, 104-111 (1986); translation from Probl. Peredachi Inf. 22, No. 2, 34-42 (1986).
It is shown that the familiar Costello bound for the free distance is valid not only for time-varying but also for time-invariant convolutional codes with sufficiently ”long” edges.
MSC:
94B10 Convolutional codes
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