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Unformatted text preview: pare it with the signal constellation of BPAM and BPPM. 5. What can you infer from the above comparison about the BEP of BFSK (with coherent demodulation), BPAM, and BPPM? BFl, TPe. Digital Modulation 1 NavCom Digital Modulation 1  Problem Set 5 Problem 2 (Transformation of a WGN vector) Let W = ( W 1 , W 2 ) denote a 2dimensional white Gaussian noise vector (WGNV) with component variance σ 2 , i.e. W 1 ∼ N (0 , σ 2 ) and W 2 ∼ N (0 , σ 2 ). The components ˜ W 1 and ˜ W 2 of the WGNV with respect to a rotated system of coordinates (see the Fgure below) can be obtained from W 1 and W 2 by the linear transformation ˜ W 1 = W 1 cos α + W 2 sin α, ˜ W 2 = − W 1 sin α + W 2 cos α. Show that ˜ W = ( ˜ W 1 , ˜ W 2 ) is also a WGNV with component variance σ 2 . α ˜ ξ 2 ξ 2 ˜ W 1 α W ˜ W 2 ˜ ξ 1 W 2 ξ 1 W 1 B±l, TPe. Digital Modulation 1 NavCom...
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This note was uploaded on 12/29/2010 for the course UAE 605 taught by Professor Ttttt during the Spring '10 term at University of Arkansas – Fort Smith.
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