A Phenomenological Study on Threshold Improvement via Spatial Coupling
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- TAKEUCHI Keigo
- Department of Communication Engineering and Informatics, the University of Electro-Communications
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- TANAKA Toshiyuki
- Department of Systems Science, Graduate School of Informatics, Kyoto University
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- KAWABATA Tsutomu
- Department of Communication Engineering and Informatics, the University of Electro-Communications
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Description
Kudekar et al. proved an interesting result in low-density parity-check (LDPC) convolutional codes: The belief-propagation (BP) threshold is boosted to the maximum-a-posteriori (MAP) threshold by spatial coupling. Furthermore, the authors showed that the BP threshold for code-division multiple-access (CDMA) systems is improved up to the optimal one via spatial coupling. In this letter, a phenomenological model for elucidating the essence of these phenomenon, called threshold improvement, is proposed. The main result implies that threshold improvement occurs for spatially-coupled general graphical models.
Journal
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- IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
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IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E95.A (5), 974-977, 2012
The Institute of Electronics, Information and Communication Engineers
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Details 詳細情報について
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- CRID
- 1390282681286767488
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- NII Article ID
- 10030938399
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- NII Book ID
- AA10826239
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- BIBCODE
- 2012IEITF..95..974T
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- ISSN
- 17451337
- 09168508
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
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- Abstract License Flag
- Disallowed