final_05

final_05 - Instruction This is a closed-book closed-note...

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Unformatted text preview: Instruction: This is a closed-book, closed-note examination. You are prohibited from operating any electronic device during the course of this examination (this includes cellular phones, calculators, etc.). You are allowed an 8.5 × 11”, two-sided sheet. Provide your an- swers in your blue book. DO NOT WRITE YOUR ANSWERS ON THE EXAMINATION SHEET. You have 2 hrs and 45 minutes. Do not provide multiple answers to any question. Cross out the wrong answers. If you provide multiple answers for a question, you will receive zero points for that question. You are required to obey University’s rules regarding academic honesty during the course of this examination. Any violation of this policy will be dealt with in accordance to the University’s guideline regarding academic dishonesty . 1. (25 points) Let x [ n ]; n = 0 , 1 , 2 ,.... denote a real Gaussian random sequence with zero mean and E { x 2 [ n ] } = 1 + 1 n . Also, E { x [ n ] x [ m + n ] } = (1 + 1 n )exp(-| m | ) . (a) Is this sequence wide-sense stationary (WSS)? Explain....
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This note was uploaded on 09/03/2009 for the course ECE 302 taught by Professor Gelfand during the Fall '08 term at Purdue.

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final_05 - Instruction This is a closed-book closed-note...

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