Chapter 7 - IS-95, cdma2000, 1X-EV, and WCDMA Performance

Abstract

The chapter analyzes the performance of voice and data service in IS-95, cdma2000, and 1X-EV. In particular, the enhancements in voice capacity of cdma2000 over IS-95, primarily because of fast forward power control and coherent reverse link demodulation, are explored. The achievable data rates in 1X-EV, in particular the tradeoffs between voice capacity and data throughput for 1X-EV-DV systems, are examined. The performance of wideband CDMA (WCDMA) is analyzed to provide a comparison that gives some indications of tradeoffs between IS-95–based systems and WCDMA systems. The following are presented as conclusion in the chapter: the cdma2000 1X provides voice capacity advantages over IS-95-B to the extent that deployment of cdma2000 systems could actually increase voice revenues for operators; the cdma2000 provides some enhancements in data capabilities over IS-95-B, however, 1X-EV systems provide even greater throughput using true connectionless links (that is, shared channels); the 1X-EV-DV systems such as 1XTREME sacrifice data throughput for voice services, however, the degradation in data throughput as the offered voice load increases is graceful; and the WCDMA has the potential to provide capacity enhancements over cdma2000 when compared with a 5 MHz deployment.