| A CLASS OF LDPC CODE’S CONSTRUCTION BASED ON AN ITERATIVE RANDOM METHOD |
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| 作者姓名： | Huang Zhonghu Shen Lianfeng |
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| 作者单位： | [1]National Mobile Communication Research Lab, Southeast University, Nanjing 210096, China [2]Institute of Communication Eng., University of Science and Technology of PLA, Nanjing 210007, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （No.60472053） |
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| 摘 要： | This letter gives a random construction for Low Density Parity Check （LDPC） codes, which uses an iterative algorithm to avoid short cycles in the Tanner graph. The construction method has great flexible choice in LDPC code＇s parameters including codelength, code rate, the least girth of the graph, the weight of column and row in the parity check matrix. The method can be applied to the irregular LDPC codes and strict regular LDPC codes. Systemic codes have many applications in digital communication, so this letter proposes a construction of the generator matrix of systemic LDPC codes from the parity check matrix. Simulations show that the method performs well with iterative decoding.
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| 关 键 词： | 低密度奇偶校验码 LDPC 随机结构 SPA算法 奇偶校验矩阵 |
| 收稿时间： | 2005-04-13 |
| 修稿时间： | 2005-05-12 |
A class of LDPC code’s construction based on an iterative random method |
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| Huang Zhonghu Shen Lianfeng.A class of LDPC code’s construction based on an iterative random method[J].Journal of Electronics,2006,23(1):124-127. |
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| Authors: | Zhonghu Huang Lianfeng Shen |
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| Affiliation: | (1) National Mobile Communication Research Lab, Southeast University, Nanjing, 210096, China;(2) Institute of Communication Eng., University of Science and Technology of PLA, Nanjing, 210007, China |
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| Abstract: | This letter gives a random construction for Low Density Parity Check (LDPC) codes, which uses an iterative algorithm to avoid
short cycles in the Tanner graph. The construction method has great flexible choice in LDPC code’s parameters including codelength,
code rate, the least girth of the graph, the weight of column and row in the parity check matrix. The method can be applied
to the irregular LDPC codes and strict regular LDPC codes. Systemic codes have many applications in digital communication,
so this letter proposes a construction of the generator matrix of systemic LDPC codes from the parity check matrix. Simulations
show that the method performs well with iterative decoding.
Supported by the National Natural Science Foundation of China (No.60472053) |
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| Keywords: | Low Density Parity Check (LDPC) codes Sum Product Algorithm(SPA) Random construction Algebraic construction Parity check matrix Generator matrix |
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