一离散时间连续信道的输入与输出分别为X、Y,其中X均值为零,方差为9,信道的转移概率密度为: (1)求输出Y的均值E y 和方差 ; (2)求条件差熵h(Y|X); (3)求信道容量C,并求达到容量时的输入概率分布p(x)和差熵h(X)
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