High bit rate services for UMTS using wideband TDMA carriers

The feasibility of four TDMA based radio interfaces for UMTS to provide up to a 2 Mbit/s service is studied. GSM compatible multicarrier and single carrier solutions with binary and multilevel offset QAM modulation are shown to be feasible for micro-cells and indoor cells. Instead, in a macro-cell environment, relatively poor capacity (2 users/cell/24 MHz operator band) for 2 Mbit/s users can be achieved with the limited cell size (<2 km). In a micro-cell (dense urban linear street), and in an indoor cell environment with good isolation between cells, the system with quaternary offset QAM modulation provides a larger capacity than the system with binary offset QAM modulation and reasonable cell range. Interference cancellation seems to have great potential especially in a micro-cellular network