Code Division Multiple Access

doi:10.1117/3.626142.ch3

Book: Basics of Code Division Multiple Access (CDMA)

Author(s): Raghuveer Rao, Sohail Dianat

Published: 2005

https://doi.org/10.1117/3.626142.ch3

Author Affiliations +

Abstract

An alternative to frequency division and time division multiple access schemes is provided by code division multiple access (CDMA), which permits multiple users to transmit simultaneously over a channel while occupying the same frequency band. This is effected by assigning a unique code or signature to each user. As we will see, CDMA offers several advantages. Various schemes have been devised to generate the codes; this chapter will introduce the fundamentals of direct-sequence spread spectrum CDMA (DS-CDMA).