WIMAX (Worldwide Interoperability for Microwave Access)
Recently WiMAX technology has gained growing interest due to its applications and advantages. WiMAX is fast emerging as a last-mile problem solution and broadband access technology. WIMAX stands for Worldwide Inte rope rability for Microwave Access based on IEEE 802.16 standard. As an air Interface for Fixed Broadband Wireless Access (FBWA) in metropolitan area networks (MANs) and for Mobile Broadband Wireless Access (MBWA) Systems thus allowing technology to be embedded in handheld devices and portable devices such as laptops. The interoperability and the standard compliance of the equipments from different vendors are assured.
The key elements for coverage prediction including calculation of link budget taken into account the particularities of the WIMAX technology and different scenario were considered. The operation scenarios are specified based on real world conditions considering the regulatory rules for radio frequency spectrum utilization for licensed and licensed exempted bands and using appropriate propagation model to calculate the cell radius. Several coverage prediction models have been analyzed such as free space model, COST231 Okumara Hata model, COST231 Walfish Ikegami model and Stanford university interim (SUI) model but in our project we will focus on free space model as line of sight (LOS) and Stanford university interim (SUI) model was adopted because it provides acceptable accuracy for NLOS scenario and frequency up to 6 GHz. Finally the system performance is evaluated in terms of the maximum transmission data rate.