SOLUTIONS
REVISED 3-11-2015
ECE 4606
Spring 2015
Homework #6
Date Assigned: March 6, 2015
Date Due: March 13, 2015
_
Reading: Fundamentals of Wireless Communication, Chapter 7. MIMO I: spatial
multiplexing and channel modeling. Available for free at
http:
ECE 4606A: Wireless Communications
MWF 11:05 am - 11:55 am, Van Leer C341, Spring 2016
Course Objective: A basic understanding of the physical layer of a wireless
communication system and some exposure to medium access control and recent
standards.
Prereq
ECE 4606
Spring 2016
Homework #5 (Complete) Revised-sign change on FT in Problem 5.4
Date
Date Assigned: 26 February 2016
Date Due: 9 March 2016
Reading: Chapter on multipath fading. The tutorial with filename Halford OFDM Unconvered, Parts 1
and 2.
Probl
ECE 4606 revised 2-15-2016
Spring 2016
Homework #4
Date Assigned: 9 February 2016 Date Due: 19 February 2016
Reading: Sections 6.6, 6.7, 6.8 and 6.9
Problem 4.1:
Suppose four basis functions e1 (t ), e2 (t ), e3 (t ), e4 (t ) are the Walsh functions W(2,1
ECE 4606
Spring 2016
Homework #3
Date Assigned: 29 January 2016
Date Due: 8 February 2016
Problem 3.1
Suppose that the constellation for the 8 signals for a digital communications link is given below:
(a) Compute the average symbol energy for this constel
ECE 4606
Spring 2016 Homework #2
Revised 1-27-2016
Date Assigned: 22 January 2016
Date Due: 29 January 2016
Problem 2.1
Suppose that the two sinusoidal waveforms below are used for binary modulation.
6
S
cos(2Sf c t ),
Ts
2
S (1) (t )
0 t Ts
S (1) (t )
S
SOLUTIONS
ECE 4606
Spring 2016
Homework #1
Date Assigned: 9 January 2014
Date Due: 16 January 2014
Reading: Sections 6.4, 6.4.1, and 6.4.2 from our book. Appendix F talks about the Q function.
Problem 1.1
Say briefly the purpose of each of the following c
SOLUTIONS
ECE4606
Spring2015
Homework#9
Problem9.1:(FriisEquation)
WorkProblem4.1fromthebook.AssumetheantennagainsareindBi.
If P t = 10W , Gt = Gr = 0 dBi,and f c = 900 MHz,find P r inWattsatafreespacedistanceof1km.
Answer:
P GG
Wewillassumethecablesloss
SOLUTIONS
First Exam
ECE 4606 Wireless Communications
Spring 2015
Prof. Weitnauer
Name:_
1. Closed Book, one page of notes allowed (front and back), calculator
allowed.
2. NO CELL PHONES ALLOWED
3. Allow 50 minutes. Initially, 3 points will be deducted fo
REVISED Problem 7.2
ECE 4606
Spring 2015
Homework #7
Date Assigned: March 25, 2015
Date Due: April 1, 2015
_
Problem 7.1 This problem uses MATLAB to simulate a Rayleigh flat fading SIMO channel with
MRC. Using MATLAB, define four vectors of 5000 samples e
SOLUTIONS
Second Exam
ECE 4606 Wireless Communications
Spring 2015
Prof. Weitnauer
Name:_
1. Closed Book, two pages of notes allowed (front and back), calculator
allowed.
2. NO CELL PHONES ALLOWED
3. Allow 50 minutes. Initially, 3 points will be deducted
ECE 4606
Spring 2015
Homework #5
Date Assigned: February 20
Date Due: February 27
_
Reading: OFDM Uncovered by Tom Halford and OFDM tutorial, part 1: PAPR,
ECC, and DAR by Alister Burr, Emmanuel Jaffrot, Eduardo Rodrigues de Lima, and
Werner Teich. Both o
SOLUTIONS
ECE 4606
Spring 2015
Homework #1
Date Assigned: 9 January 2014
Date Due: 16 January 2014
_
Reading: Sections 6.4, 6.4.1, and 6.4.2 from our book. Appendix F talks about the Q function.
_
Problem 1.1
Say briefly the purpose of each of the followi
ECE 4606
Spring 2015
Homework #2
Date Assigned: 21 January 2014
Date Due: 28 January 2014
_
Reading: Sections 6.6 and 6.7.
_
Problem 2.1 (Problem 6.9 from the book).
Generate and plot the time waveform for a binary baseband communication system which
send
SOLUTIONS
ECE 4606
Spring 2015
Homework #3
Date Assigned: January 29
Date Due: February 4
_
Reading: 6.4.2 (power spectral density or PSD), 6.5&6.6 (pulse shaping), 6.10.2 (QAM
PSD)Sections 6.8 DPSK, Offset QPSK, pi/4 QPSK.
_
Problem 3.1:
Suppose that the
SOLUTIONS
ECE 4606
Spring 2015
Homework #4
Date Assigned: February 5
Date Due: February 11
_
Reading:
_
Problem 4.1:
Compute the probability of bit error for each of coherent BFSK, non-coherent BFSK, and
BPSK, assuming 10 log10 Eb / N o 8.5dB.
Answer:
Eb
SOLUTIONS
ECE 4606
Spring 2016
Homework #6
Date Assigned: 16 March 2016
Date Due: 30 March 2016
_
Reading: Section 7.10
_
Problem 6.1: Simulate a Rayleigh fading channel.
A non-line of site (NLOS) flat fading channel is usually called a Rayleigh fading ch