MSIS 8040 Data Communications Theory and Practice

Assignment 5, Issue date: 06/30/05; Due date: 07/07/05

 

Solve the following questions (Chapter 15)

 

15.1    A signal has a fundamental frequency of 1000 Hz.  What is its period?

 

15.2    Express the following in the simplest form you can:

  1. sin(2pft – p) + sin (2pft + p)
  2. sin (2pft) + sin (2pft – p)

 

15.3    Sound may be modeled as sinusoidal functions. Compare the relative frequency and wavelength of musical notes.  Use 330 m/s as the speed of sound and the following frequencies for the musical scale.

 

Note

C

D

E

F

G

A

B

C

Frequency

264

297

330

352

396

440

495

528

 

15.4    If the solid curve in Figure 15.11 represents sin(2pt) what does the dotted curve represent?  That is, the dotted curve can be written in the form A sin(2p + j); what are A, f, and j?