ECE 564/645 - Digital Communication Systems (Spring 2014)
Midterm Exam #1
Monday, March 10th, 7:00-9:00pm, ELAB 303
Overview
The exam consists of four (or ve) problems for 100 (or 120) points. The points for each part of each
problem are given in bracket
ECE 645 - Digital Communication Systems (Spring 2013)
Final Exam
Monday, May 6th, 1:30-3:30pm, Marston 211
Overview
The exam consists of four problems for 100 points. The points for each part of each problem are given
in brackets - you should spend your t
ECE 564/645 - Digital Communication Systems (Spring 2013)
Midterm Exam #2
Tuesday, April 16th, 7:00-9:00pm, Marston 211
Overview
The exam consists of four problems for 100 points. The points for each part of each problem are given
in brackets - you should
ECE 564/645 - Digital Communication Systems (Spring 2013)
Midterm Exam #1
Monday, March 11th, 7:00-9:00pm, Marston 211
Overview
The exam consists of four problems for 100 points. The points for each part of each problem are given
in brackets - you should
ECE 564/645 - Digital Communications, Spring 2014
Homework #2
Due: February 26, 2014 (in class)
#$" !
be a wide-sense stationary Gaussian random process with mean zero and autocorrelation
.
.
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r
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ECE 564/645 - Digital Communications, Spring 2014
Homework #4
Due: April 4, 2014 (in class)
1. Consider a (5,2) linear block code for the binary symmetric channel with crossover probability . Let
the code be given by:
!
and the parity check matrix
"
(b)
ECE 564/645 - Digital Communications
Homework #5
Spring, 2014
Due: April 18, 2013
linear block code,
by looking at columns of
&
$ "
%#!
(Hint: Think about how to get
min
1. [Thank Shamit for this one.] (a) Prove the Singleton bound: for any
).
(b) C
ECE 564/645 - Digital Communications, Spring 2014
Homework #3
Due: March 7, 2014 (in class)
! 1)0'(& $% #
1. Consider the following on-off keying system for transmitting a bit
. For
, we let
, and for
, we let
"
4 4
8765
(
!
otherwise
2
3 # 1
is t
ECE 564/645 - Digital Communications, Spring 2014
Homework #1
Due: February 12, 2014 (in class)
1. Consider an independent and identically distributed (IID) sequence
, where each
is drawn
from the alphabet
and the probability mass function of each of th
ECE 564/645 - Digital Communications (Spring 2013)
Practice Problems #1
#$
!'
2
3 1
&% # 0#) (
$ !
"
where is the received vector,
if
. Let
and
be independent Gaussian
(i.e. this is an AWGN vector channel). Suppose there
) and
8
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8
% 7
1. A stream of independent information bits, each equally likely to be or , are grouped to form row
, where
vectors of length 3, which are used by the channel encoder to form codewords by
Note: Nowhere in this problem do you need to construct the s
ECE 564/645 - Digital Communication Systems (Spring 2013)
Final Exam Practice Problems
1. Consider an independent and identically distributed (IID) discrete source
that can assume one
of
values, where each source symbol has the following probability mas
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