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LDPC code, LDPC decode

于 2023-07-14 发布 文件大小:8.50 kB
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在信息论中,低密度奇偶校验(LDPC)码是一种线性纠错码,是在有噪声的传输信道上传输信息的一种方法,它是用稀疏二部图构造的。LDPC码是容量逼近码,这意味着对于对称无记忆信道,存在允许噪声阈值设置非常接近(甚至在BEC上任意接近)理论最大值(Shannon极限)的实际结构。噪声阈值定义了信道噪声的上界,在该上界之下,信息丢失的概率可以尽可能小。利用迭代信度传播技术,LDPC码可以在时间上按照其块长进行线性解码。

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