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Consider a discrete memoryless channel and assume that H(x) is the amount of information per symbol at the input of the channel; H(y) is the amount of information per symbol at the output of the channel; H(x|y) is the amount of uncertainty remaining on x knowing y; and I(x;y) is the information transmission. Which of the following does not define the channel capacity of a discrete memoryless channel? 

(A) max I(x;y)

 p(x)

(B) max [(H(y) – H(y|x))]

 p(x)

(C) max [(H(x) – H(x|y))]

 p(x)

(D) max H(x|y)

 p(x)


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1 Answer

(D) max H(x|y) 

 p(x)
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