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
Definition of  Algorithm  An algorithm is a design or plan of obtaining a solution to a problem. The solution is presented by listing all steps in which they are carried out.

best example of dfd?

Process of Data mining Data mining is an iterative process that typically involves the following phases: Problem definition A data mining project starts with the understanding o

How to make an assignment entitled "Decision Making: Forecasting" and I am required to make a pseudocode and flowchart based on the task.

• The key to preventing problem involving shared storage is get some way to prohibit more than one process from reading and writing the shared data concurrently. That part of the p



QUESTION a) Differentiate between a dynamic and a static web site. b) Why are electronic mails (e-mails) preferred to the post office mails? How do they affect the modern of

what is rom

what duality principle and huntington postulates