Versions of WiMAX

The two versions of WiMAX for fixed or for mobile access. Several optional features that are supported in both 802-16.2004 and 802.16e profiles are more likely to be implemented in 802.16e products simply because mobile services stand to gain more from the added functionality. Among these, improved support for MIMO and AAS will bring a substantial increase in throughput and NLOS capabilities.

The first version uses OFDM; WiMAX profiles based on 802.16-2004 are better suited to fixed applications that use directional antennae because OFDM is inherently less complex than SOFDMA. As a result, 802.16-2004 networks may be deployed faster and at a lower cost.


The second will most likely use OFDMA; OFDM gives 802.16e profiles more flexibility when managing different user devices with a variety of antenna types and form factors. It brings a reduction in interference for user devices with omnidirectional antennas and improved NLOS capabilities that are essential when supporting mobile subscribers.

Subchannelization defines subchannels that can be allocated to different subscribers depending on the channel conditions and their data requirements. A key difference between 802.16-2004 and 802.16e profiles is the multiplexing technique.

Reference : WiMAX FORUM