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On the Equivalence of Interleavers for Turbo Codes

机译:Turbo码的交织等效性

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Three of the most common interleavers for turbo codes (TCs) are dithered relative prime (DRP) interleavers, quadratic permutation polynomial (QPP) interleavers, and almost regular permutation (ARP) interleavers. In this paper, it is shown that DRP and QPP interleavers can be expressed in the ARP interleaver function form. Furthermore, QPP interleavers can be seen as a particular case of ARP interleavers, in which the values of the periodic shifts follow the quadratic term of the QPP interleaver function. Some application examples of the equivalent expressions are provided. Particularly, in the QPP interleaver case, the different instances in the Long-Term Evolution standard are considered. Obtained results are useful when investigating a suitable and general permutation model for TCs.
机译:Turbo码(TC)最常见的三种交织器是抖动相对质数(DRP)交织器,二次置换多项式(QPP)交织器和几乎规则的置换(ARP)交织器。本文表明,DRP和QPP交织器可以用ARP交织器功能形式表示。此外,QPP交织器可以看作是ARP交织器的一种特殊情况,其中周期性移位的值遵循QPP交织器函数的二次项。提供了等效表达式的一些应用示例。特别是在QPP交织器的情况下,考虑了长期演进标准中的不同实例。在研究合适的TC通用排列模型时,获得的结果很有用。

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