Principle of Communications

Homework 4, Due 1/12

Problem 1

Amplitude modulation  and demodulation

FourierT.m

Page90AM.mdl

Page167P2_5.mdl

 

Use the wavread and sound to hear the songs:

 

[yy,Fs,NBits]=wavread('bee5th.wav');

sound(yy,Fs)

 

furelise.wav

bee5th.wav

 

Then use Page90AM.mdl to modulate and then Page167P2_5.mdl

to demodulate.and store the result in zz.

Hear the sound and compare the difference from yy.

sound(zz,Fs)

 

 

ftp your homework to

ftp://stud@140.127.208.113

in the directory communication\HW4

by the following format:

檔案名稱:hw#_學號.zip

例如:資工同學,作業2

   檔案名稱:hw4_a09355xx.zip

注意:檔名不能有中文

The password is given in class.