Short convolutional codes with maximal free distance for rates 1/2, 1/3, and 1/4 (Corresp.)

This paper gives a tabulation of binary convolutional codes with maximum free distance for rates 12, 13, and 14 for all constraint lengths (measured in information digits) up to and including nu = 14. These codes should be of practical interest in connection with Viterbi decoders.