| REGULAR LOW-DENSITY PARITY-CHECK CODES BASED ON SHIFTED IDENTITY MATRICES |
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| 作者姓名： | He Shanbao Zhao Chunming Jiang Ming |
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| 作者单位： | National Mobile Communications Research Lab, Southeast University, Nanjing 210096, China |
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| 基金项目： | Supported by the Key Project of National Nature Sci- ence Foundation of China （No.60390540）. |
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| 摘 要： | This paper extends the class of Low-Density Parity-Check （LDPC） codes that can be constructed from shifted identity matrices. To construct regular LDPC codes, a new method is proposed. Two simple inequations are adopted to avoid the short cycles in Tanner graph, which makes the girth of Tanner graphs at least 8. Because their parity-check matrices are made up of circulant matrices, the new codes are quasi-cyclic codes. They perform well with iterative decoding.
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| 关 键 词： | 低密度奇偶校验码 LDPC 准循环码 过程编码 |
| 收稿时间： | 2004-02-09 |
| 修稿时间： | 2004-10-18 |
Regular Low-Density Parity-Check codes based on shifted identity matrices |
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| He Shanbao Zhao Chunming Jiang Ming.REGULAR LOW-DENSITY PARITY-CHECK CODES BASED ON SHIFTED IDENTITY MATRICES[J].Journal of Electronics,2006,23(1):20-22. |
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| Authors: | Shanbao He Chunming Zhao Ming Jiang |
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| Affiliation: | National Mobile Communications Research Lab,Southeast University,Nanjing 210096,China |
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| Abstract: | This paper extends the class of Low-Density Parity-Check (LDPC) codes that can be constructed from shifted identity matrices. To construct regular LDPC codes, a new method is proposed. Two simple inequations are adopted to avoid the short cycles in Tanner graph, which makes the girth of Tanner graphs at least 8. Because their parity-check matrices are made up of circulant matrices, the new codes are quasi-cyclic codes. They perform well with iterative decoding. |
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| Keywords: | Low-Density Parity-Check (LDPC) codes Quasi-cyclic codes Construction of codes Sum-product decoding |
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