Frequency and bandwidth, Basic Computer Science

Frequency and Bandwidth:

Let us try to understand a little about how information is transmitted. The information may be in the form of sound (human voice, music) or it may be visual (printed page, microfilm, video picture) or it may be digital data. Whatever may be the form, it must be converted to electrical signals (electromagnetic waves) before it can be transmitted over a given medium. Such signals very often cannot be sent over a channel as they are, but must be modulated in some way to fit them into the carrying medium. The frequencies of the electromagnetic waves are normally radio frequendies which range from low frequencies capable of carrying only small amounts of information to millimeter waves, which can carry very large amounts. Above the radio frequencies lies light frequency, which can be modulated to carry even larger amounts of information. In other words, the amount of information that can be sent over a given channel in a given time is dependent on the bandwidth. The bandwidth available increases with increasing carrier frequency. Thus, generally speaking the wider the bandwidth, the larger the amount of information which can be carried and the faster its speed. 

Posted Date: 10/24/2012 4:59:58 AM | Location : United States

Related Discussions:- Frequency and bandwidth, Assignment Help, Ask Question on Frequency and bandwidth, Get Answer, Expert's Help, Frequency and bandwidth Discussions

Write discussion on Frequency and bandwidth
Your posts are moderated
Related Questions
Problem Write the steps to use the Network setup wizard. Elaborate the optional subcomponents in the windows component wizard. 1. Click Next to skip past the Welcome screen.

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Conditional statement: An If statement is composed of three parts. The first part should be keyword w.r.t language to convey to the computer that it is if statement. And a Bo

Ms-PowerPoint Presentation for Promoting National Parks You have been hired by Tourism Department to make a presentation to the travel agents from different countries. Design

write a basic program for f= a+b+c//2

Create a program that uses a menu with options to enter student information (name, ID, GPA), print student information, or quit the program. Use data files and FILE pointers to sto

note on high level language and low level language

Question 1 Briefly explain principles of effective navigation Question 2 Explain the terms URI and URL. Why should you use Relative URI? Question 3 What are the di

What is CAI? Explain its pitfalls.

QUESTION (a) Convert each of the following expressions to prefix and postfix. (i) (A+B)*(C+D) (ii) A-B/(C*D^E) (^ denotes exponentiation) (b) The following algorithm c