Warning: Use of undefined constant referer - assumed 'referer' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 102

Warning: Use of undefined constant host - assumed 'host' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 105

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 106

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 109
How Cell Phones Work - College Essay

How Cell Phones Work


Each day about 30,000 people in the United States sign up for and start using a cellular phone. Therefore it is likely that you or someone you know has a cell phone and uses it on a regular basis. They are such great gadgets - with a cell phone you can talk to almost anyone from just about anywhere, because about 80% of the U.S. has coverage (Dang). But have you ever wondered how a cell phone works?
One of the most interesting things about a cell phone is that it is really a radio- an extremely sophisticated radio, but a radio nonetheless. A good way to understand the sophistication of a cell phone is to compare it to a CB radio or a walkie-talkie. A CB radio is a simplex device. That ...

Want to read the rest of this paper?
Join Essayworld today to view this entire essay
and over 50,000 other term papers

much higher power, can transmit perhaps 5 miles. Someone using a cell phone, on the other hand, can drive clear across a city and maintain a conversation the entire time. Cells are what give a cell phone its incredible
range (Anonymous #2).
The genius of the cellular system is the realization that a city can be chopped up into small cells, and that the cells allow extensive frequency reuse across a city. Frequency reuse is what lets millions of people own cell phones without problems. It works because the carrier chops up an area to about 10 square miles (Dang).
In the dark ages before cell phones, people used radiotelephones in their cars. In the radiotelephone system there was one central antenna tower per city and perhaps 25 channels available on that tower. This central antenna meant that the phone in your car needed a powerful transmitter - big enough to transmit 40 or 50 miles. It also meant that not many people could use radiotelephones - there just were not enough ...

Get instant access to over 50,000 essays.
Write better papers. Get better grades.


Already a member? Login


CITE THIS PAGE:

How Cell Phones Work. (2007, December 20). Retrieved March 29, 2024, from http://www.essayworld.com/essays/How-Cell-Phones-Work/76155
"How Cell Phones Work." Essayworld.com. Essayworld.com, 20 Dec. 2007. Web. 29 Mar. 2024. <http://www.essayworld.com/essays/How-Cell-Phones-Work/76155>
"How Cell Phones Work." Essayworld.com. December 20, 2007. Accessed March 29, 2024. http://www.essayworld.com/essays/How-Cell-Phones-Work/76155.
"How Cell Phones Work." Essayworld.com. December 20, 2007. Accessed March 29, 2024. http://www.essayworld.com/essays/How-Cell-Phones-Work/76155.
JOIN NOW
Join today and get instant access to this and 50,000+ other essays


PAPER DETAILS
Added: 12/20/2007 09:45:38 AM
Category: Technology
Type: Premium Paper
Words: 999
Pages: 4

Save | Report

SHARE THIS PAPER

SAVED ESSAYS
Save and find your favorite essays easier

SIMILAR ESSAYS
» Cell Phones In School
» Cell Phones In School
» How Technology Is Warping Peopl...
» Experiencing Cyberspace
» Raising the Driving Age: A Chan...
» Modern Technology and Its 1984 ...
» The Effects of Technology on Ki...
» Best Buy SWOT
» Transcendental Reflective Essay
» Fuel Cell
Copyright | Cancel | Contact Us

Copyright © 2024 Essayworld. All rights reserved