Taken from WiMAX Business & Technology Strategiew - Editorial Suppliement for WiMAX World Conference and Exposition - 2005. This page last updated Sept-2005.

802.16-2004Point-to-multipoint broadband wireless access (BWA) market 2005+
802.16eExtends WiMAX for mobility

Comparative 3G/4G technologies

 Peak ThroughputTypical Expected ThroughputLatency in Radio LinkTime FrameApplications
3g (e.g. EV-DO, HSDPA)3 to 10 Mbps500kbps to 1Mbps100 msec goalBroadly available 2006Semi-broadband, including limited multimedia
Mobile WiMAX75 Mbps1 to 5 Mbps initially, 5 to 10 Mbps laterSub 100 msec2007 to 2008Full broadband with greater multimedia capabilities
3G Long Term Evolution100 Mbps10 Mbps10msec goal2008 goalFull broadband with greater multimedia capabilities
4G1Gbps10 to 100 MbpsFurther improvedInitial networks 2012 or laterFaster broadband with full multimedia, including high quality video streaming

Radio Technology Mechanisms

TechniqueWhere Used
CDMA (Code Division Multiple Access)Used by WCDMA/HSDPA and CDMA2000
OFDM (Orthogonal Frequency Division Multiplexing)Key tech in phys layer of WiMAX and 802.11a and 802.11n. Likely to be used for Evolved 3G and 4G. Supports strong spectral efficiency and high data rates
HSPDA (High Speed Downlink Packet Access)3G techmax peak rates of 10Mbps
Higher Order ModulationWiMAX specifies QPSK, 16-QAM and 64 QAM. HSPDA and CDMA2000 use QPSK and 16-QAM
Advanced CodingWiMAX and 3G use advanced coding methods such as Turbo codes and Low Density Parity Codes (LDPC)
Adaptive Modulation and CodingWiMAX and 3G use adaptive radio links that adjust to dynamic radio conditions.
Efficient SchedulingWiMAX and 3G schedule transmissions to favor users wth best instantaneous radio conditions
Mobile Receive DiversityMultiple receivers enhances system capacity. Used in 1xEV-DO, planned for HSDPA and WiMAX
Channel EqualizationSpecfied for WiMAX and planned for 3G systems. More difficult to do with CDMA than OFDM
Adaptive Antenna SystemsBeam steering from the base station increases system capacity. Being specified for WiMAX with pre-standard implementations already available. Under consideration for Evolved 3G
MIMOUnder consideration for WiMAX, HSDPA and Evolved 3G
VoIPPlanned for WiMAX. On roadmap for 3G and Evolved 3G