EE 5283/EE 4953: Communication Networks
Homework 2 Solution
1. The multipoint configuration implies that the two devices share the same
medium. If they both transmit at the same time, then their signals intefere
with each other. That is, the signals overl

EE 5283/EE 4953: Communication Networks
Homework 4 Solution
1. We use the noiseless capacity formula for this problem. The capacity is
C = 2B log2 M , where B is the bandwidth and M is the number of signal
levels. The number of bits per signal level is lo

EE 5283/EE 4953: Communication Networks
Homework 3 Solution
1. The thermal noise power will be
N = kT B = 1.38 1023 10000 10 106 W = 1.38 1012 W.
(1)
The noise power in dBW is
NdB = 10 log10
N (W)
= 10 log10 1.38 1012 dBW = 118.6 dBW. (2)
1W
2. The temper

EE 5283/EE 4953 Communication Networks
Homework 1 Solution
Problem 1 (6 points)
Problem 2 (5 points)
A detailed analysis of the three-army problem can be found in Bertsekas-Gallager Section 1.4. See a
short answer

EE 5283/EE 4953: Communication Networks
Homework 6 Solution
1. To begin with, note that the code is systematic, which means that each
codeword consists of the 4 information bits appended by 3 information
bits.
There are ar least two ways to sove this prob

EE 5283/EE 4953: Communication Networks
Homework 5
Due Thursday, September 29, in class
1. For a two-dimensional parity check code, explain why the burst error
detection capability is the length of the row plus one. Assume transmission
is taking place row

EE 5283/EE 4953: Communication Networks
Homework 6
Due Thursday, October 6, in class
1. A linear block code that maps K
the following generator matrix:
1 0
0 1
G=
0 0
0 0
= 4 bits into a codeword of 7 bits has
0
0
1
0
0
0
0
1
1
0
1
1
1
1
1
0
0
1
.
1
1
(1)

EE 5283/EE 4953: Communication Networks
Homework 3
Due Thursday, September 15, in class
Recommended review: Stallings, Appendix 3A from Chapter 3
and Apppendix A; Bertsekas-Gallager, Sections 2.2.1 and 2.2.2
1. Stallings, Problem 3.14 (5 points)
2. Stalli

EE 5283/EE 4953: Communication Networks
Homework 5 Solution
Problem 1
Consider a burst error of length 1+(row length) as indicated in the two examples
below:
x
xxxxxxxxxxxxxxxx
xxxxxxxxxx
x
x

EE 5283/EE 4953: Communication Networks
Homework 7
Due Thursday, October 13, in class
1. Consider the operation of the go back n ARQ protocol where the acknowledgement is piggybacked on the reverse traffic. The frame size is variable,
resulting in a frame

EE 5283/EE 4953: Communication Networks
Homework 2
Due Thursday, September 8, in class
Recommended review: Stallings, Appendix 3A from Chapter 3 and Apppendix A
1. Stallings, Problem 3.1(a) (5 points)
2. Stallings, Problem 3.8 (10 points)
3. Stallings, Pr

EE 5283/EE 4953: Communication Networks
Homework 7 Solution
1. Refer to the Fig. 1. The sender transmits frames 0, 1, 2, . up to the
window size n-1. The sender will not have to wait or go back (in the
absence of errors), if a frame with RN=1 is received

EE 5283/EE 4953: Communication Networks
Homework 1
Due Thursday, September 1, in class
1. Stallings, Problem 2.2 (6 points)
2. Stallings, Problem 2.4 (5 points)
3. Bertsekas-Gallager, Problem 1.3 (10 points)
4. Stallings, Problem 2.6 (10 points)
5. A syst

EE 5283/EE 4953: Communication Networks
Homework 4
Due Thursday, September 22, in class
1. Stallings, Problem 3.16 (10 points)
2. Stallings, Problem 3.20 (10 points)
3. Stallings, Problem 3.22. In part (a), also give the power spectral density
of the outp