Electrical Communications Systems

Course No. ECE.09.433

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Assignment 4

• 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 an A/D converter.

• Problems in Textbook
• 5.29
• 3.8
• 3.9
• 3.10
• 3.60
• 3.67

• XTRA Credit 1

Resolve the midterm

• XTRA Credit 2

Write a Matlab function that computes and displays the spectrum of a single-tone modulated FM signal. The function input is the FM modulation index b. The function should calculate and display the following:

• The signal spectrum computed analytically, using Bessel Functions
• The signal spectrum computed using the fft function.

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