ECEN 487 QUIZ 9
NAME:_
3. What window type would you choose for a bandpass filter design if your primary concern is rejecting an interfering source that is known to be very close to your desired passband corner frequency? a) Hamming; b) Rectangle; c) Dolp
ECEN 487 QUIZ 8
NAME:_KEY_
1.
Consider the four impulse response plots below.
(a)
(b)
(c)
(d)
For each magnitude frequency response on the over side, indicate which impulse response above produced it, and state which generalized linear phase system type,
ECEN 487
QUIZ 12
NAME:_
1.
x[n] is a white noise random process with variance 2 n . As shown in the
x
figure below, y[ n ] = h[ n ] * x[ n ] where h[n] is a filter impulse response with a
corresponding frequency response of H (e j ) = sin 2 . Find an expr
ECEN 487
QUIZ 1
NAME:_KEY_
1.
x[ n] is a sequence with z-transform X ( z) that has poles at z = 0.5 and z = 0.3 j , and
a single zero at z = 2 .
a) Is there an R.O.C. choice for which x[ n] is simultaneously right sided and for
which the Fourier transform
ECEN 487
QUIZ 6
NAME:_KEY_
1.
You are a DSP engineer for Hewlett Hackard Hearing Helpers Corporation. Your
assignment is to design the digital implementation of a frequency selective emphasis
filter in a digital hearing aid. This is just a 117 tap FIR fil
ECEN 487 QUIZ 4
NAME:_
1.
You are a DSP engineer for Sony Corporation. Your assignment is to design the digital portion of the sample rate conversion function in the next Bluray DVD player. The Bluray DAC runs at a sample rate of 96 ks/sec. You want to co
ECEN 487 QUIZ 3
NAME:_KEY_
1.
Use Caucheys residue theorem to compute the inverse z transform of
X ( z) = ( z 2)( z + j 0.15)( z (z +
2 )( z 3 j
)
for n > 0 only. The desired region of
e )( z + 7)( z 0.1 j + 2)
convergence includes a circular contour abou
ECEN 487 QUIZ 1
NAME:_KEY_
1.
Name one significant advantage of discrete-time processing over an analog implementation for a function that could be implemented by either method.
Ease of system modification or updating Reduced cost (in some cases) Immunity
ECEN 487 QUIZ 11
NAME:_KEY_
1.(10) What is the frequency causal analytic signal, xa[n], which corresponds to the real signal x[n] = a sin 0 n + b cos 1n , o 1? Draw a block diagram to show how xa[n] can be generated from x[n]. xi[n] is just a 90 phase del
E CEn 487 Digital Signal Processing Laboratory
Lab 1
Introduction to the Software Development
Environment and Signal Sampling
D ue Dates
This is a three week lab. All TA check off must be completed before 3:00 p.m. January 31, or
the lab will be marked la
ECEn 487 Digital Signal Processing Laboratory
2012 Lab 2
Finite Impulse Response Filtering
D ue Dates
This is a three week lab. All TA check off must be completed by Tuesday February 21, or the
lab will be marked late. Note that the 21st is a Monday instr
ECEn 487 Digital Signal Processing Laboratory
Lab 3
FFT based Spectrum Analyzer
Due Dates
This is a three week lab. All TA check off must be completed prior to the beginning of class on
the lab book submission due date listed below, or the lab will be mar
PROCEEDINGS O F THE IEEE, VOL. 6 6 , NO. 1 , JANUARY 1978
51
On the Use of Windows for Harmonic Analysis
with the Discrete Fourier Transform
FREDRIC J . H ARRIS,
A hmw-This Pw!r mak= available a concise review of data windaws pad the^ affect On the
Of
in
ECEN 487
QUIZ 1
NAME:_KEY_
1.
List at least two methods that might be used to compute the z-transform of some
sequence x[n].
1. Table look-up.
2. Direct sample-by-sample (term-by-term) sequence transformation
3. Identifying a closed form expression for th
ECEN 487
QUIZ 2
NAME:_KEY_
1.
a) Define a sequence x[ n] with z-transform X ( z) = lncfw_X ( z) , with an X ( z) that has
poles at z = 1.5 and z = 3 j , and a single zero at z = 1 / 4 . Is there an R.O.C. choice
for which x[ n] is two sided and for which
ECEN 487
QUIZ 3
NAME:_KEY_
1.
Use Caucheys residue theorem to compute the stable inverse z transform of
X (z) =
!
( z " 2 )( z " # )
for n > 0 only.
( z " )( z " 5 )( z + 7 )( z + 3)
1
2
For n > 0 there is one pole of X(z) zn-1 enclosed by C: | z | = 1.
$
ECEN 487
QUIZ 4
NAME:_
1.
a) You are a DSP engineer for Motor Roller Wireless Communications Inc. Your
assignment is to design the digital portion of the sample rate conversion function
to convert sampled audio data from high fidelity CD quality to AM HD
ECEN 487
QUIZ 5
NAME:_
1.
Let h[n] be the finite length impulse response for a lowpass filter used in the antialiasing stage of a decimator. The decimation rate is M = 3.
a) Specify the values of the impulse response for e1[ n ] in a polyphase filter
impl
ECEN 487
QUIZ 6
NAME:_KEY_
1.
You are an engineer working for Yaesu Electronics, Amateur Radio Division. Your
assignment is to design the digital implementation of a narrowband bandpass filter
for CW (Morse code) reception k the FT-897 amateur radio trans
ECEN 487
QUIZ 8
NAME:_
1.
Consider the following two rational polynomial system functions:
1 4 z1
z1 4
, H 3 ( z) =
.
H 2 ( z) =
1 1 z1
1 1 z1
3
3
a) Which of them is minimum phase? Why?
H 3 ( z) is minimum phase since all its poles and zeros are inside t