ELEN 638: Antennas & Propagation
Homework 2
1. Use the far-field expressions developed for Type I antennas with sources defined in
rectangular coordinates and L = /2 to calculate the radiation patterns of the two
rectilinear antennas shown below and a) pl

POWER SPECTRAL DENSITY OF GMSK MODULATION USING MATRIX METHODS
Kiran Kuchi*
Motorola Labs, Access Technologies Research, Fort Worth, TX 76137.
email: [email protected]
Vasant K. Prabhu
Department of Electrical Engineering, Box 19016, The University of

DSP C5000
Chapter 21
Frequency Modulation
GMSK Modulation
Copyright 2003 Texas Instruments. All rights reserved.
Learning Objectives
ESIEE, Slide 2
Overview of Digital Modulation
Understanding GMSK Modulation
Learning how to Implement a GMSK Modula
Copyri

THIS IS FOR LEFT PAGES
1
ECE710 Space Time Coding For Wireless
Communication
Zhirong Li
Electrical & Computer Engineering Department
University of Waterloo, Waterloo, ON, Canada
[email protected]
Abstract
This manuscript is intended for providing

Analysis of a Two-Branch Maximal Ratio and Selection Diversity System with Unequal Branch Powers and Correlated Inputs for a Rayleigh Fading Channel
Kai Dietze
Thesis submitted to the Faculty of the Virginia Polytechnic Institute and State University in p

Question # 1.1
Put these modulation schemes in order of power efficiency starting
with the highest down to the lowest.
A. QPSK (coherent).
B. Binary FSK.
C. 16 QAM.
D. M=16 level orthogonal FSK.
Question # 1.2
Put these modulation schemes in order of spec

Lecture 8: Digital Modulation II
Chapter 5 Modulation Techniques for
Mobile Radio
1
Recall our picture of the overall wireless transmission and
receiving system:
2
Last lecture
Analog AM and FM
Benefits of Digital Modulation
Power and Bandwidth Efficien

ECEN 683 - Wireless Communication Systems
Spring 2014
Practice Midterm Exam #1
Problem 1. (30 points)
Consider the following modulation formats:
(A) Differential BPSK with square pulses,
(B) 16PSK with root raised cosine pulses ( = 0.2 ),
(C) MSK (assume

1. Calculate the attenuation in dB for the transmission schemes a-f for f 0=2.45 GHz and plot them
together versus path length from 1 km to 10,000 km; normalize each plot to tis value at 1 km such
that all curves will start at a value of 0 dB, and use a l

802.11 Frames
NSSA-242
Networking II
802.11 MAC Frames
3
types:
Management Frames:
Used for Station association, disassociation, timing & synch, and
authentication.
Control Frames:
Used for Handshaking (RTS/CTS) and ACK
frames during CP.
Data Frames:

NSSA-242
Wireless Networks
Path Loss
dBm/mW Shortcuts
2
dBm/mW Shortcuts
For every 3 dB of
gain/loss, power doubles
(gain) or power drops in
half (loss)
-3
-6
dB
dB
=
=
power
power
+3
+6
dB
dB
=
=
2x
4x
power
power
3
dB & RF Formulas
dBm
mW
= 10 log(mW)
=

NSSA 242
Mobile IP
Agenda
Mobility
in 802.11
2
Mobility in 802.11
What
does roaming or mobility
mean?
Aps connected to a larger
network
Same or different SSID
Node process
AP process
3/13/17
Heidi Klossner 2013
Mobility in 802.11
Not
specified in 802.11
N

NSSA-242
Networking II
Agenda
Ad
hoc networking
Multi-hop Networking
MANET
2
WLAN Modes
Infrastructure
Ad hoc
WLAN Modes
Infrastructure
utilized most frequently
associates with AP
All communication goes through the
access point
Used for wireless acces

AT77.11 Digital Modulation Techniques
III. Frequency Shift Keying
3.1 Binary FSK
3.1.1 Binary FSK Signal and Modulator
In its most general form, the binary FSK scheme uses two signals with different
frequencies to represent binary 0 and 1
s1 (t ) A cos 2

ECEN 683- Wireless Communication Systems
Spring Semester 2014
Time+Place: MWF 10:20-11:10am, ENPH 206
Instructor:
Office:
Phone:
email:
Scott L. Miller
WEB 310B
(979) 862-8744
smiller@.ece.tamu.edu
Office Hours: MTWRF 1:30-3:30pm
Textbooks:
1) Miller, Wir

ECEN 683: Assignment 1
Reading Assignment:
1. Chapter 1.
2. Chapter 2.
Problems:
1. (Gallager) Consider the electric eld in (2.4).
(a) It has been derived under the assumption that the motion is in the direction of the
line-of-sight from sending antenna t

ECEN 683: Assignment 2
Reading Assignment:
1. Chapter 3.
Problems:
1. In the text, we mainly use real symbols to simplify the notation. In practice, complex constellations are used (i.e., symbols are sent along both the I and Q components). The simplest
c

ECEN 683: Assignment 3
Reading Assignment:
1. Chapter 4.
Problems:
1. In Figure 4.2 we set a specic reuse pattern. A channel used in a cell precludes its use in
all the neighboring cells. With this allocation policy the reuse factor is at least 1/7. This

ECEN 683: Assignment 4
Reading Assignment:
1. Chapter 5.
Problems:
1. What is the maximum reliable rate of communication over the (complex) AWGN channel
when only the I channel is used? How does that compare to the capacity of the complex
channel at low a

ECEN 683: Assignment 5 (Optional)
Reading Assignment:
1. Chapter 6.
Problems:
1. Consider a system with 1 transmit antenna and L receive antennas. Independent CN (0, N0 )
noise corrupts the signal at each of the receive antennas. The transmit signal has a

Since the channel number (C) need to be an integer in calculating the traffic capacity, for the
unescorted case, there is C/7 channels/cell, and for the sectored case, there will be C/12
channels/cell, thus the total channel numbers is collected every 84

ECEN 683 - Wireless Communication Systems
Homework #2
Assignment Date: 1/24/14
Due Date: 1/31/14
1. (10 points) A bandpass signal x t which has a complex envelope g x t is input to a bandpass
filter with impulse response h t . Suppose we write this impuls

ECEN 683 - Wireless Communication Systems
Homework #3
Assignment Date: 2/05/14
Due Date: 2/12/14
1. (20 points) Consaider a QAM signalling format with M possible transmitted signals per symbol
interval. The signal can be written as
s t = Ap t kT s a k cos

ECEN 683 - Wireless Communication Systems
Homework #4
Assignment Date: 2/19/14, Due Date: 2/26/14
1. (15 points)
(a) Using the randn comand in MATLAB, generate a large number of zero mean complex Gaussian random variables. Note: A complex Gaussian random

ECEN 683 - Wireless Communication Systems
Homework #5
Assignment Date: 2/26/14, Due Date: 3/17/14
1. Generation of Correlated Gaussian Random Variables (20 points)
It is desired to generate a set of five Gaussian random variables, Y = Y 1 Y 2 Y 5 T , whos

ECEN 689 - Wireless Communication Systems
Homework #6
Assignment Date: 3/19/14, Due Date: 3/26/14
Mod. 1
Demod. 1
d k 1
Mod. 2
Channel 2
h2
Demod. 2
d k 2 Diversity
Combiner
Mod. M
dk
Channel 1
h1
Channel M
hM
Demod. M
dk
d k M
In this homework you will

ECEN 689 - Wireless Communication Systems
Homework #7
Assignment Date: 3/26/14, Due Date: 4/2/14
1. Spectral Efficiency of OFDM (40 points)
In this problem we will carefully compare the spectral efficiency of an OFDM system with an
equivalent serial modul

ECEN 683 - Wireless Communication Systems
Homework #8
Assignment Date: 4/7/14
Due Date: 4/16/14
1. (20 points) In a cellular CDMA system, capacity is limited only by the amount of interference
present. Anything we can do to decrease the interference level