New cellular wireless system concept for very high bit rate data transmission with smart antennas at the mobile and base station

The authors proposed a new cellular system concept based on multiple antennas at the mobile stations and base station. The system is essentially a multiuser multiple input multiple output system (MU-MIMO). Real time video is the primary potential application of the system. The number of antenna elements at the base stations is larger than at the mobiles and they could be grouped into multiple arrays. This multi-array approach could be further extended to fixed wireless networks. The novel concept of the MIMO path beamformer exploits specular multipath to allow communication between two mobiles with antenna arrays. The system is able to provide spectrum efficient high bit rate asymmetrical traffic. It could be easily integrated with space-time coding and different transmit diversity techniques. The system configuration and algorithms have to be optimized for different environments such as urban microcellular, microcellular, suburban and rural to provide high capacity and spectrum efficiency. Simulation results for an urban microcell are presented