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96年 - 96 經濟部所屬事業機構_新進職員甄試試題_地球物理:探勘地球物理學#147258
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題組內容
十四、以下為三張不同地區的時間震測剖面圖,已標示出各主要斷層位置。
1. 請敘明何圖屬正斷層(Normal Fault)系列,何圖屬逆斷層(Reverse Fault)系列。(3分)
相關申論題
2. 指出何圖具有生長斷層(Growth Fault)的跡象。(3分)
#605458
1. (10%) In wireless communication systems, Additive White Gaussian Noise (AWGN) channel is often assumed. What do "Additive", "White", and "Gaussian" mean?
#605459
2. (20%) Constellations with two kinds of labeling are show as below. Symbols from the left and right figure, respectively, are transmitted over the AWGN channel. (a) \((3\%)\) How many information bits can be carried per symbol for the left figure?
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(b) \((3\%)\) How many information bits can be carried per symbol for the right figure?
#605461
(c) \((7\%)\) Which labeling (left figure one or right figure one) will result in lower symbol error rate? Why?
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(d) \((7\%)\) Which labeling will result in lower bit error rate? Why?
#605463
3. (10%) A matrix H for a linear block code is defined such that each vector v is a valid codeword if and only if Hv^T = 0. Assume that $$H = \begin{bmatrix} 1 & 0 & 1 & 1 & 0 & 0 \\ 1 & 1 & 0 & 0 & 1 & 0 \\ 0 & 1 & 1 & 0 & 0 & 1 \end{bmatrix}$$. (a) Is the vector \( v_{1} = [1\ 0\ 1\ 0\ 1\ 1] \) a valid codeword vector? Why or why not?
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(b) How many valid codewords can be found?
#605465
4. (10%) Given φ₁(t) = 1, φ₂(t) = -t, φ₃(t) = 2t² - 1, (a) Show that \(\varphi_1(t)\) and \(\varphi_2(t)\) are mutually orthogonal over the interval (-1, 1)
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(b) Are \(\varphi_1(t)\) and \(\varphi_2(t)\) mutually orthogonal over the interval (-1, 1)? Why or why not?
#605467
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