Agilent CDMA-basics

Agilent - CDMA BasicsRFCD 101: CDMA Basics

Technical data is subject to change Copyright@2003 Agilent Technologies Printed on Dec. 4, 2002 5988-8499ENA

Although there are many types of spread spectrum communications systems, this presentation gives an overview of the proposed CDMA cellular system defined by the TIA 45.5 sub-committee. Largely based on the CDMA system developed by Qualcomm, the TIA system uses direct sequence modulation with digital codes to spread its spectrum. Other types of spread spectrum systems use frequency hopping techniques or a combination of frequency hopping and modulation with digital codes (direct sequence). The intent of this paper is to provide insight into the technology of CDMA and to describe some of the operating features of the now standardized TIA CDMA system. The TIA st