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EE6170 Intro. to Wireless & Cellular Communications
Problem Set 7 April 13, 2012
1. (T&V 6.2) Consider the basic uplink AWGN channel with power constraints Pk on
user k (for k = 1, 2). Orthogonal multiple access is optimal when the degrees of freedom are
EE6170 Intro. to Wireless & Cellular Communications
Problem Set 6 April 11, 2012
1. (T&V 5.6) In this exercise, we study time sharing, as a means to communicate over
the AWGN channel by using different codes over different intervals of time.
(a) Consider
Instructor: Prof. Aditya K. Jagannatham
Coordinates
ACES 205D
M ilb on 2nd floor ACES B ildi
Mailbox
2 d fl
Building.
e mail: adityaj@iitk.ac.in
Ph: 7494
Fundamentals of Wireless Communication
David Tse and Pramod Viswanath
Cambridge University P
EE6170 Intro. to Wireless & Cellular Communications
Problem Set 4 March 9, 2012
1. Consider a multipath channel with L i.i.d. Rayleigh faded taps. OFDM with N subchannels is used over this channel with an appropriate cyclic prex.
(a) Write down the receiv
EE6170 Intro. to Wireless & Cellular Communications
Tutorial 3 February 24, 2012
1. Suppose X is an exponential random variable with PDF f X ( x ) given by
f X ( x ) = e x
for x 0,
n
nd E[esX ]. If X1 , X2 , ., Xn are exponential i.i.d with above PDF, the
EE617 Intro. to Wireless & Cellular Communications
Tutorial 2 February 3, 2012
1. A BPSK symbol ( a) is transmitted over L i.i.d Rayleigh fading channels. The fading
coefcient of the ith channel hi CN (0, 2 ). Show that the average probability of
error is
EE617 Intro. to Wireless & Cellular Communications
Tutorial I January 27, 2012
1. Suppose X is a random variable with PDF f X ( x ) given by
f X (x) =
x
exp
2
x2
22
for x 0,
nd the PDF of Y = X 2 .
2. Consider the scenario in the gure below where the rec
EE670 Quiz 2012
1. Multi-user CDMA: Consider an multi-user CDMA scenario with K = 15
2
users and noise power n = 0 dB. Let all users have equal received power
P and the wireless channel of each user is a multipath channel with L = 4
independent multipath
EE670WirelessCommunications
1. WirelessCommunicationsandDiversity (8Lectures)
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
M.
N.
WirelessChannelModeling
Pathloss,Shadowing
FastFading
Rayleigh/RiceanFadingChannels
BERPerformance
Diversity
BERPerformancewithdiversit
EE 670 - Assignment 6
Due Apr. 20th, 2012
1. Consider an OFDM system with BW = 10 MHz. Let the delay spread
of the outdoor channel Td be 1 s.
(a) What is the minimum number of subcarriers required for this
OFDM system?
(b) If the number of subcarriers N =