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Unformatted text preview: N 1 = 4 , N 2 = 1 , N 3 = 2 , and N 4 = 6 . Assume that there is a transmit power constraint: E " 4 X i =1 X 2 i # ≤ 8 . (5) Find the channel capacity. What is the capacity-achieving allocation of transmit power? 4. (20%) Fading channel. Consider an additive noise fading channel: Y = V X + Z, (6) where Z is additive noise, and V is a random variable representing fading. Z, V, and the input X are independent. Argue that knowledge of the fading factor V improves the capacity by showing that I ( X ; Y | V ) ≥ I ( X ; Y ) . (7) 1...
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This note was uploaded on 12/20/2011 for the course COMMUNICAT 101 taught by Professor Hoangxinhung during the Fall '11 term at 金沢工業大学.
- Fall '11