COMSATS Institute of Information Technology, Islamabad
Tuesday, February 07, 2012
WiCAST
The increasing market demands for higher data rates along with mobility has kept the telecommunication researchers and industry on the move since last three decades, producing continuously evolving innovative solutions. Among these, WiMAX is a rapidly emerging next generation wireless telecommunication technology and standard developed by the IEEE and WiMAX Forum to address point-to-multipoint broadband outdoor wireless networks. The standard is the first of its kind to have 4th generation services as well as significant mass deployment, thus a 4G testbed in itself. The WiMAX systems have a wide range of applications, such as mobile data services, last mile connectivity for homes and businesses, and backhaul for wireless hot spots.

Currently, Pakistan has one of the most widely deployed WiMAX infrastructures and this trend is foreseen to increase steadily. Thus, the skilled manpower trained in this cutting edge technology is expected to play a significant role in the future growth of the industry in the country. To address these demands, Center for Advanced Studies in Telecommunication (CAST) has been working on the WiMAX since the standard was finalized, and has developed WiCAST ™ - a state of the art indigenous WiMAX testbed. The WiCAST testbed fully encompasses and complies with the IEEE 802.16 d/e standards and addresses the technological issues such as coping rapidly changing channel, synchronization and multiple antenna systems with solutions from latest published research. In its full version, the WiCAST not only provides an insight into WiMAX technology but helps train the researchers and graduate students about the latest technical concepts in the area of Wireless Communications.
The WiCAST product has a special emphasis on wireless physical layer processes, which are well known to have key role in efficient communication in dynamical real world channel conditions. It uses the WiMAX-standardized physical layer with multiple-stage channel coding, a variety of cancellations to address different QoS, multiple antenna space-time coding and single- / multi-carrier transmission. The combined effect of this physical layer setup is a seamless wireless transmission in every practical channel condition and for different QoS demands.
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