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PI 30
P2 25
P3 115
P4 30
Total 100
EENGINFE 420 Digital Signal Processing
SPRING 2014-2015
QUIZ 1
Na me(full) __________ Date 0604201 5
St Number ________ Duration 50 min
Lecturer Assoc Prof Dr Erhan A ince
Read the following instructions carefully
I) Please put your name on both the question paper and the answer sheet 2) Usejront and back of each page on the anwers booklet to answer each question 3) After the exam submit both the question paper and your solution booklet
Problem 1 Consider an accumulator described by the input-output relationship depicted below and
determine if the system is (a) linear (b) time invariant
Ln
x[l]y[n] = 1=-00
Problem 2 Consider an up-sampler with an input-output relationship as shown below
n = 0 plusmnL plusmn2L
otherwise
Is this system time invariant or time varying Justify your answer by showing work
Problem 3 Explain how a non-causal FIR system can be made causal To justify your answer you may
use an example
Problem 4 Consider an LTI system with inputx[n] and unit impulse response h[n] as given below
x[n] = 2n u[-n]
h[n] = u[1-]
Determine the output y [ n] of the systemmiddot
P(ob~1~
Accu(h u(~WI
alJ Lf
x(eJ
e - 00
~
~t-(nl =- h2 Yl-f~j
Y f
J[1j 4~L] =-- ~ L X[~J -t b L Xl-((1
-e~ ~-o
~
f X(J ~ C z (U -+ I lzf(j --7 ~ [1 2 ctgtlt [lj j~t ttl egt-Jgt
1 1 ~ c L fi [(j +S Z x~[R)
-( -0004 (=~o
i gt
~ sw~ puJ- x CJ ~ x fL -lJ ~r + 1- (viCoJC~ O~V ) [l- eo J a otlgt j CRJ COIrC1f-cL
---e~
~ lt - middotl~J L X l~J k- -ca)
J e ~ [J~ L ~ I [~J =- L X [k -~J
aCc(flltAI~r 5 c
tl~- fvW( ct1 Sj~t-e(l1
VrobefY 2 shy
U f- gtcllrVL
( 0li LI 02l X [1Ij t~(IlLJ
othvLw 5l2
n -=-u il ~ I I
u~u
X (gt-I1J ~ t~ [0deg-10)~ (l= flogt (IplusmnL) ( 170 plusmnzy o
~Se- ~
9
v 0 - ~AscrJL f Il S J sk IV C ot bz rYc ck cauS o-l b j s )S~ ~Ifh- all- ~ppngtr(iC-k1J chC2co(co~~i~ k
5jsklt
~ [d- S(A of 0 - 6 0~ ) bull L
1lN5 s 15k-- lgtr h(l 0- c Ct -cs tLQ
------~--~--------~~ 5 I(-L 11[J =i 0
-I ~( lt0
yrobefY 1Ij
- X[) ~ 02it 1) C-r0 ~ L~ ~ vt lJ hQ) ~ vck)
00 -- 0 0 ----1shy____--+ 1 ~11~11~ k
od (~J ~ L t-[tJ h(tl-8 L- -ob _~ll ~l ~-k~ ~ J ~ 1 ~_~abull
o ~(n-J k
middot - 11111])(1 bull p bull
o
~ [lj IS 22Ao ~ V l gt0
h lJl - kJ S 2flAo ftr ~gtfL
o
L
- 2 ~[Ij - () =
I - ti)
~( ~ 0 JllJ= 2shy
vJhL- Alt-v
Cipound)n ltl -f 00
= ~ jLl=- L L ~ (1shyd(0 L
~
~ -k ~ - - fshy(- - n--=- _0
P(ob~1~
Accu(h u(~WI
alJ Lf
x(eJ
e - 00
~
~t-(nl =- h2 Yl-f~j
Y f
J[1j 4~L] =-- ~ L X[~J -t b L Xl-((1
-e~ ~-o
~
f X(J ~ C z (U -+ I lzf(j --7 ~ [1 2 ctgtlt [lj j~t ttl egt-Jgt
1 1 ~ c L fi [(j +S Z x~[R)
-( -0004 (=~o
i gt
~ sw~ puJ- x CJ ~ x fL -lJ ~r + 1- (viCoJC~ O~V ) [l- eo J a otlgt j CRJ COIrC1f-cL
---e~
~ lt - middotl~J L X l~J k- -ca)
J e ~ [J~ L ~ I [~J =- L X [k -~J
aCc(flltAI~r 5 c
tl~- fvW( ct1 Sj~t-e(l1
VrobefY 2 shy
U f- gtcllrVL
( 0li LI 02l X [1Ij t~(IlLJ
othvLw 5l2
n -=-u il ~ I I
u~u
X (gt-I1J ~ t~ [0deg-10)~ (l= flogt (IplusmnL) ( 170 plusmnzy o
~Se- ~
9
v 0 - ~AscrJL f Il S J sk IV C ot bz rYc ck cauS o-l b j s )S~ ~Ifh- all- ~ppngtr(iC-k1J chC2co(co~~i~ k
5jsklt
~ [d- S(A of 0 - 6 0~ ) bull L
1lN5 s 15k-- lgtr h(l 0- c Ct -cs tLQ
------~--~--------~~ 5 I(-L 11[J =i 0
-I ~( lt0
yrobefY 1Ij
- X[) ~ 02it 1) C-r0 ~ L~ ~ vt lJ hQ) ~ vck)
00 -- 0 0 ----1shy____--+ 1 ~11~11~ k
od (~J ~ L t-[tJ h(tl-8 L- -ob _~ll ~l ~-k~ ~ J ~ 1 ~_~abull
o ~(n-J k
middot - 11111])(1 bull p bull
o
~ [lj IS 22Ao ~ V l gt0
h lJl - kJ S 2flAo ftr ~gtfL
o
L
- 2 ~[Ij - () =
I - ti)
~( ~ 0 JllJ= 2shy
vJhL- Alt-v
Cipound)n ltl -f 00
= ~ jLl=- L L ~ (1shyd(0 L
~
~ -k ~ - - fshy(- - n--=- _0
VrobefY 2 shy
U f- gtcllrVL
( 0li LI 02l X [1Ij t~(IlLJ
othvLw 5l2
n -=-u il ~ I I
u~u
X (gt-I1J ~ t~ [0deg-10)~ (l= flogt (IplusmnL) ( 170 plusmnzy o
~Se- ~
9
v 0 - ~AscrJL f Il S J sk IV C ot bz rYc ck cauS o-l b j s )S~ ~Ifh- all- ~ppngtr(iC-k1J chC2co(co~~i~ k
5jsklt
~ [d- S(A of 0 - 6 0~ ) bull L
1lN5 s 15k-- lgtr h(l 0- c Ct -cs tLQ
------~--~--------~~ 5 I(-L 11[J =i 0
-I ~( lt0
yrobefY 1Ij
- X[) ~ 02it 1) C-r0 ~ L~ ~ vt lJ hQ) ~ vck)
00 -- 0 0 ----1shy____--+ 1 ~11~11~ k
od (~J ~ L t-[tJ h(tl-8 L- -ob _~ll ~l ~-k~ ~ J ~ 1 ~_~abull
o ~(n-J k
middot - 11111])(1 bull p bull
o
~ [lj IS 22Ao ~ V l gt0
h lJl - kJ S 2flAo ftr ~gtfL
o
L
- 2 ~[Ij - () =
I - ti)
~( ~ 0 JllJ= 2shy
vJhL- Alt-v
Cipound)n ltl -f 00
= ~ jLl=- L L ~ (1shyd(0 L
~
~ -k ~ - - fshy(- - n--=- _0
yrobefY 1Ij
- X[) ~ 02it 1) C-r0 ~ L~ ~ vt lJ hQ) ~ vck)
00 -- 0 0 ----1shy____--+ 1 ~11~11~ k
od (~J ~ L t-[tJ h(tl-8 L- -ob _~ll ~l ~-k~ ~ J ~ 1 ~_~abull
o ~(n-J k
middot - 11111])(1 bull p bull
o
~ [lj IS 22Ao ~ V l gt0
h lJl - kJ S 2flAo ftr ~gtfL
o
L
- 2 ~[Ij - () =
I - ti)
~( ~ 0 JllJ= 2shy
vJhL- Alt-v
Cipound)n ltl -f 00
= ~ jLl=- L L ~ (1shyd(0 L
~
~ -k ~ - - fshy(- - n--=- _0