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Unformatted text preview: Name: SOLMTID EEE 3113: Signals and Systems Exam 1 F'elzoruar1..Ir 2?, EDDIE
Prof. Papandreou—Suppappola You must answer all 4 problems for full credit. The number of points for each part of a problem is
given. For full credit, show all steps and label all axes. o[t} is the eontinnons~tirne unit step, and {ﬁt} is the continuoustime impulse. an denotes convolution. 1Where appropriate: i show all intermediate steps
I label all axes
o circle the ﬁnal answer This area is for ofﬁcial use only: Emblem mes 1. Assume that :1'[I} is the signal platted below: mm {a} [3 pts] Evaluate thsintsgral [3 m{t]§{£+1]tﬁ : 1%?) i :1 —a
{h} [3 pts} Compute and plat yﬂ) = 55H] 1: rift + (1.5} ;: I {GEf 0 5)
[c] [9 pts} Write the equation and plot ﬁt} = ﬁt) (aﬂ + 2] — aﬂ — 2]) rat?) Us) gussxt‘cwg} 2. Consider a discretetime system with input signal ﬁn] and corresponding output signal
y[n] =nrr[n+ 1]. .—. Tf; EHJ]
Clearly explaining your answer, determine whether or not the above system is:
 . [1 n 3
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{h} {16' p13} Linear (c) (16' pm} Time—invariant (Tl) Eel
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m  «(mm mm i more Th3 ‘ oimalCnl 4+ lamaill”: 3. Consider a ﬁnesr and time—invariant [LTI] system with impulse respense Mt} = 4 u[2 — t}. {a} (It? pts) Is this system HIRE]I stable? Explain your answer. (11} {15 gets} If the input is ﬁt} = u[t — 1} — u[t — 4), ﬁnd the system eutput ylﬁt}. ﬂ .5135: status I, w 5: W953] cu: is; 1:, as). Q. 1: = ‘3’":
u—e _ _ r: U!
a? u m a thug u I: & Mamet .."'_ Lﬂ 93 Ha Li's} cm
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>er n‘ (a H: ff, 0 $1 I L flail—{J OWL?!" 4. Cnnsider the fellewing interconnection of LTI systems: {a} (In? pts} Find the overall impulse response Mn] of the system in terms (if h] [71.], ﬁght],
h3[n],sn:i hdn]. kin’3: @1343, + hltnurhacnzﬁMcnn {h} [15 pts} Determine and plot Mn] if
Erin] = light} = u[n — 1], h3[n.] = 2n[n — 3], Elﬁn] : rl[n — 1] Extra points: {5 pts} If :r[n] = Mn], ﬁnd and plot yin] = ache] a: Mn] ':. (Stubs1'1  $1M [Y's"‘31) '3; {Elm—ll :(asi‘mm lath—11) * gin—:7
a Scwrll + J. Eﬁhez'] a, 1 3 mm swim jittelwwj
mﬁ‘fmq :: gnf‘n—lXt 9~1EWEK
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Lyn >31 1 Q‘Stwr’l'l "l Li “EMA? ...
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 Spring '07
 Chakrabarti
 Digital Signal Processing, Signal Processing, pts, LTI system theory, Impulse response

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