Electrical Communications Systems
Course No. 0909-331-01
Spring 2005
Assignment 5: Xtra Credit
Due Tuesday, May 3, 5:00 PM
- A discrete memoryless source has an
alphabet
of seven symbols whose probabilities of occurence are:
| Symbol |
S0 |
S1 |
S2 |
S3 |
S4 |
S5 |
S6 |
| Probability |
0.25 |
0.25 |
0.125 |
0.125 |
0.125 |
0.0625 |
0.0625 |
Design a Huffman code for this source. Calculate the code
efficiency. Compare this with the efficiency if the symbols are encoded
using a natural binary code.
- Problems in Textbook
- Write a
Matlab
function/program that displays the time-domain signals and
spectra
for any 8-bit digital word modulating a sinusoidal carrier using ASK,
FSK
and PSK techniques.
- Given the input binary sequence
1100100010,
plot (using Matlab) the waveforms of the I and Q components of a
modulated
signal obtained by using QPSK modulation.