EE511 FALL 2002
INTRODUCTION TO COMMUNICATION SYSTEMS
FINAL PROJECT
RESULTS (
SECOND PLACE: BitRateBandits @
209714
SECOND PLACE: Gusslerconn @ 209714
GROUP
BITS/PACKET
DATE
COMMENT
FLEMING
524288
Jeremy Fleming
Rick Conner
Nick Rittinger
BitRateBandits
209714
12-13-02
OK
Landon Borders
Alexander Maroudis
Andy Ruble
Grant Stucker
Gusslerconn 209714 12-13-02 OK
Karla Conn and Jon Gussler
AKKS 149796 12-13-02 OK
Kalyan Tallapragada
Albert Wong
Kalyan Tangerala
Subhash Vallurapalli
StreamX
131073
(Andrew)Tan,Aik Meng
Lim,Chin Loong
TBIRD
131072
Muthulakshmi Muthukumarasamy
Venkata Vaidyanathan
Apoorva Kahale, Wei Su
YoMama
65536
Eddie Travis Thomas
Ray Khatir
HASSEBROOK
32768
Hassebrook
FINAL PROJECTS
UNDER CONSTRUCTION
Graders: Please return grades, by email, on XLS form provided below. Visualizations are treated as one homework problem. Homework grade should be between 0 and 100 points. I suggest weighting everything equally, including the individual problem parts. Also, to expedite the grading, grade each problem part as correct (full credit), partially correct (half credit) or completely wrong (0 credit). You will receive 2 copies of the solutions, keep one and put one in the library ee511 folder.
Class
Roster and Grader Assignment
SETUP AND USAGE OF EE511 NEWSGROUP
Updated
V4 Mixer and DSBSC Description
Final
Project Description
Final
Project Sample M file
PROTOCOL for FINAL PROJECT
Student sends the bit
matrix size, modulator and demodulator m files to instructor. All the files
sent to the instructor have the "groupname"
as a prefix so the instructor can keep the track of the individual group m
files and data.
1. BIT MATRIX SIZE
(student sends this to instructor): The student is ranked by the total number
of bits that can be transmitted through the channel. The bit matrix is 2
dimensional. It has a length Nbit (column dimension)
and a width of Nseq (row dimension). These values,
named "Nbit" and "Nseq",
along with a character string containing "groupname",
they are stored in a file called "groupname_Bsize.mat."
An example m file is "groupname_createBsize.m"
2. BIT MATRIX (instructor
generates this based on groupnameBsize values): The
bit matrix is generated and stored in a file called groupname_B.mat
and the matrix is called B. A sample code that will generate a 2x16 bit matrix
B is "Bgen.m." I will use Bgen to generate a random sequence of bits of the size
specified by the student in "groupnameBsize.mat."
3. MODULATOR (student
sends the modulator m file to the instructor): A modulator m file by the name
"groupname_modulator.m" will be sent to the
instructor. Its input is the file named "groupname_B.mat."
The program will create a 1 x N real vector "s" and a Nseq x N, bit check matrix, called "Bcheck." The signal vector will be stored in "groupname_signal.mat" and the bit check matrix is
stored in "groupname_Bcheck.mat." The
length is N=524288=65536*8. The Bcheck matrix (Nseq x N) has 3 element values +1 for a bit value of
"1" to be present, -1 for a bit value of "0" to be
present and 0 for "don't care."
4. CHANNEL (instructor
will run this program, channel.m, on vector s). The channel will do two things, add noise
and then lowpass filter. The noise is based on the
value sigma=0.05*(max(s)-min(s)) and is generated by w=sigma*randn(1,N). The noisy vector is sn=s+w. The noisy vector sn is
convolved with the Butterworth low pass filter of order 8 and fc=N/8. The output of the channel will be a real one
dimensional vector, "r", of size 1xN. This r vector will be stored in
groupname_r.mat.
5. DEMODULATOR/BINARIZER
(student sends the demodulator.m file to the
instructor): A demodulator file by the name "groupname_demodulator.m" will be sent to the
instructor. Its input file is groupname_r.mat.
Its output will be a Nseq x N real matrix. Each row
of the matrix will represent the demodulated and binarized
bit stream defined in B. This output will be stored in "Bs" and saved
to the file groupname_Bs.mat. NOTE: The demodulator
should also binarize the signals in Bs to have values
of either 1 or 0.
6. BIT CHECK (instructor
will run bitcheck, bitcheck.m, to test the students data for errors): The instructor
will run a program that will input the groupname_B.mat
file, groupname_Bcheck.mat file and the groupname_Bs.mat file. The program will go to each value of
1 or -1 in the Bcheck matrix and see if the
associated element in the Bs matrix is (1) if Bcheck
is 1, then Bs value must be 1 (above 0.5), (2) if Bcheck
is -1, then Bs must be 0 (below 0.5). For each element of Bcheck
that is 0 (between -0.5 and +0.5) the associated value in Bs is ignored. The
resulting values will be verified with the B matrix. To be acceptable, there
must not be any errors in either the number of ones and zeros or the specific
bit values when compared to B. The results will be posted on the web.
FAQs
MATLAB:
- Where is a manual for MATLAB? Try the library first. Most students only use the manual in the very beginning of their MATLAB experience. Once into it, the language is intuitive enough and there are enough sample M files that learning MATLAB is somewhat self-sustaining without manuals. Type "matlab" to execute intepreter, "help ?" to see listing of operators, "help" for listing of functions, "who" to see active variables, "what" for listing of M files and always use "clear" to start over again.
- How do
you initialize the dimension of a variable? One way is to initialize its
values by zeros(M,N) or ones(M,N). Ex: A=zeros(10,8) is a 10 x 8 matrix of
zeroes. Another function is "ones" which works the same way as
"zeros". Another method is nested loop, ie.,
1:5 loops from 1 to 5 so A(1:5)=3:7 will store the values 3 to 7 in the
first 5 elements of A.
