Quasi-cyclic unit memory convolutional codes

Jørn Justesen, Erik Paaske, Mark Ballan

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    Unit memory convolutional codes with generator matrices, which are composed of circulant submatrices, are introduced. This structure facilitates the analysis of efficient search for good codes. Equivalences among such codes and some of the basic structural properties are discussed. In particular, catastrophic encoders and minimal encoders are characterized and dual codes treated. Further, various distance measures are discussed, and a number of good codes, some of which result from efficient computer search and some of which result from known block codes, are presented
    Original languageEnglish
    JournalI E E E Transactions on Information Theory
    Issue number3
    Pages (from-to)540-547
    Publication statusPublished - 1990

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