Title :
There are many good periodically time-varying convolutional codes
Author_Institution :
Bell Commun. Res., Morristown, NJ
fDate :
3/1/1989 12:00:00 AM
Abstract :
It is shown empirically that the number of good periodically time-varying convolutional codes increases exponentially with the period for any set of parameters. Hence, they can be used to enhance the security of cryptosystems without sacrificing error correction capability. It is shown that some periodically time-varying convolutional codes improve the free distance compared with fixed codes
Keywords :
error correction codes; convolutional codes; cryptosystem security; error correcting codes; error correction capability; free distance; periodic codes; periodically time varying codes; Convolutional codes; Cryptography; Decoding; Error analysis; Error correction codes; Length measurement; Power system security; Shift registers; Viterbi algorithm; Writing;
Journal_Title :
Information Theory, IEEE Transactions on
