Data Receiver for the Universal Mobile Telecommunications System (UMTS)



This industrial PhD project has investigated both the performance characteristics and the implementation issues of a downlink receiver for UTRA/FDD. The performance analysis has successively tackled detection (Rake receiver) and synchronisation in the broad sense (code phase acquisition and tracking, pilot-aided channel estimation) aspects. Theoretical BER has been calculated and verified through numerical simulations with the help of simulation channels based on real measurement data and channel models with dynamic behaviour, and including Inter-Path Interference (IPI) and Multiple Access Interference (MAI). Performance enhancement with optional transmit diversity schemes (Space-Time Transmit Diversity and Feedback Transmit Diversity) and optimisation of the slot structure for high-mobile speeds have also been covered. Regarding the implementation aspects, the core algorithms developed in the first phase of the project have been implemented in a combined software and hardware solution. The downlink data receiver achieves 384 kbps in a vehicular environment with 290 kGates, 150 MIPS of DSP power and a power consumption of 70 mW. The work has been supported by Siemens and ATV (Danish Academy of Technical Science). (Benny Vejlgaard, Preben Mogensen)
Effektiv start/slut dato31/12/200131/12/2001