A Generalization of Threshold Saturation: Application to Spatially Coupled BICM-ID
A Generalization of Threshold Saturation: Application to Spatially Coupled BICM-ID
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阈值饱和度的推广：在空间耦合 BICM-ID 中的应用
DOI：
10.1109/isit.2014.6875247
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
K. Takeuchi
中科院分区：
文献类型：
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作者：
K. Takeuchi;K. Takeuchi;K. Takeuchi
空间耦合被证明可以将信念传播（BP）性能提高到最大后验（MAP）性能。本文讨论了一类扩展的空间耦合系统。推导了一个势函数，用于表征扩展SC系统BP性能的下界，并证明了它与传统SC系统的势不同。这可能意味着扩展SC系统的BP性能与相应的非耦合系统的MAP性能不一致。作为扩展SC系统的一种应用，本文还研究了迭代译码的SC位交错编码调制（BICM-ID）。
Spatial coupling was proved to improve the belief-propagation (BP) performance up to the maximum-a-posteriori (MAP) performance. This paper addresses an extended class of spatially coupled (SC) systems. A potential function is derived for characterizing a lower bound on the BP performance of the extended SC systems, and shown to be different from the potential for the conventional SC systems. This may imply that the BP performance for the extended SC systems does not coincide with the MAP performance for the corresponding uncoupled system. SC bit-interleaved coded modulation with iterative decoding (BICM-ID) is also investigated as an application of the extended SC systems.