Title :
On unit constraint-length convolutional codes
Author :
Abdel-Ghaffar, Khaled A S
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Davis, CA, USA
fDate :
1/1/1992 12:00:00 AM
Abstract :
Unit constraint length convolutional codes are codes that can be generated by encoders with a single delay element. The maximal free distances of these codes are determined in terms of the maximal minimum distances of linear block codes. A formula for the weight enumerator of unit constraint-length convolution codes is derived and a MacWilliams identity to determine the weight enumerator state diagram of a code from the weight enumerator state diagram of its dual code is given
Keywords :
codes; MacWilliams identity; linear block codes; maximal free distances; maximal minimum distances; state diagram; unit constraint-length convolutional codes; weight enumerator; Block codes; Books; Convolutional codes; Delay; Maximum likelihood decoding; Viterbi algorithm;
Journal_Title :
Information Theory, IEEE Transactions on
