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Unformatted text preview: 率 对于离散对称信道 时达到信道容量: C H (Y ) H ( p1 , p2 ,..., ps ) H(Y)为输入等概率时输出的熵 H(Y)为输入等概率时输出的熵 H(p1,p2,…,ps)为信道转移概率矩阵某行元素 注释: 对强对称信道, 注释: 对强对称信道,输入等概率时达到容量,此时输出 等概率。 C log s H ( p11, p12 ,..., p1s ) 2.2 离散对称道的容量 离散对称道的容量 例 2.2 一信道的转移概率矩阵如图,求信道容量和达 到容量时的输出概率。 1 / 2 1 / 3 1 / 6 1 / 6 1 / 3 解: 设输出概...
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This document was uploaded on 02/10/2014.

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