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# m2_practice - ECE 562 Fall 2011 PRACTICE EXAM 2 1 True or...

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Unformatted text preview: ECE 562 Fall 2011 November 16, 2011 PRACTICE EXAM 2 1. True or False. Determine if the following statements are True or False. You need to provide a brief justification for your answer to get credit. (a) A binary DPSK system in AWGN has P b = 10- 4 . It is possible to use the same power and achieve a P b ≤ 10- 6 by cutting the bit rate in half. (b) The pulse x ( t ) = e-| t | sinc t T satisfies the Nyquist criterion for zero ISI with symbol period T . (c) The zero-forcing equalizer always maximizes the SINR at its output. (d) The Viterbi algorithm for equalization produces the MPE estimate of the trans- mitted symbol sequence even when the symbols are correlated in time. (e) Z ∞ z exp- z 2 4 I ( z ) dz = 2 e 2. Bi-orthogonal signaling. Consider the signal set with M = 2 N signals given by: s m ( t ) = √ E g m ( t ) m = 1 ,...,N- √ E g m- N ( t ) m = N + 1 ,...,M. where { g k ( t ) } N k =1 are orthonormal functions....
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m2_practice - ECE 562 Fall 2011 PRACTICE EXAM 2 1 True or...

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