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arXiv 1003.4539cs.ITmath.IT
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线性咬尾网格:特征生成器和BCJR构造

Linear tail-biting trellises: Characteristic generators and the BCJR-construction

Heide Gluesing-Luerssen, Elizabeth Weaver

摘要:

我们研究了Koetter/Vardy(2003)和Nori/Shankar(2006)提出的线性分组码的咬尾网格的构造。对于一个给定的代码,我们将定义的特征生成器的集合比Koetter/Vardy更一般,我们将研究如何选择的特征生成器的影响所产生的产品网格集,称为KV-网格。此外,我们将证明每个KV-网格是BCJR-网格,定义在一个稍微强于Nori/Shankar的意义上,并且后者总是不可合并的。最后,我们将利用BCJR-网格的对偶化技术解决Koetter/Vardy的一个对偶猜想,并证明该猜想的最小网格。

英文摘要:

We investigate the constructions of tail-biting trellises for linear block codes introduced by Koetter/Vardy (2003) and Nori/Shankar (2006). For a given code we will define the sets of characteristic generators more generally than by Koetter/Vardy and we will investigate how the choice of characteristic generators affects the set of resulting product trellises, called KV-trellises. Furthermore, we will show that each KV-trellis is a BCJR-trellis, defined in a slightly stronger sense than by Nori/Shankar, and that the latter are always non-mergeable. Finally, we will address a duality conjecture of Koetter/Vardy by making use of a dualization technique of BCJR-trellises and prove the conjecture for minimal trellises.

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