Cdma

Topics: Code division multiple access, Channel access method, Time division multiple access Pages: 3 (729 words) Published: June 19, 2013
Course Project: Wireless Technology Upgrade

NETW-561 Wireless Technologies

Submitted to Professor Kucheck
on June,23 2013 by Adam Gomez

Table of Contents

Project Proposal

I plan to upgrade are current network to a fourth generation technology called Code Division Multiple Access (CDMA). This technology will greatly increase the stability and performance of your current network, by allowing better voice and data transfer rates for your current customers while keeping the cost low to deploy to new your customers, but first lets take a brief moment to go over exactly what CDMA is.

Introduction

Code division multiple access is a channel access method used by various radio communication technologies. It should not be confused with the mobile phone standards called CDMAOne, CDMA2000 and WCDMA, which are often referred to as simply CDMA, and use CDMA as an underlying channel access method. One of the concepts in data communication is the idea of allowing several transmitters to send information simultaneously over a single communication channel. This allows several users to share a band of frequencies. This concept is called multiple accesses. CDMA employs spread-spectrum technology and a special coding scheme to allow multiple users to be multiplexed over the same physical channel. By contrast, time division multiple accesses, divides access by time, while frequency-division multiple access divides it by frequency. CDMA is a form of spread-spectrum signaling, since the modulated coded signal has a much higher data bandwidth than the data being communicated.

 An analogy to the problem of multiple access is a room in which people wish to talk to each other simultaneously. To avoid confusion, people could take turns speaking, speak at different pitches, or speak in different languages. CDMA is analogous to the last example where people speaking the same language can understand each other, but other languages are perceived as noise and rejected....
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