Optimal space time trellis code design for fast fading channels

The demand for high-speed mobile wireless communications is rapidly growing. MIMO technology promises to be a key technique for achieving the high date capacity and spectral efficiency for wireless communication systems of the near future.An investigation of Space Time Trellis Code (STTC) design criteria is presented. There are four sets of design criteria which apply to different channel types. Design criteria Set I and II apply to slow fading channel and design Ccriteria Set III and VI apply to fast fading channel. If a code has small diversity order, design criteria Set I and III will apply and in the case of large diversity order, criteria Set II and VI apply.Based on these design criteria, this dissertation provides a study of optimal STTC construction for fast fading channel. When the diversity order of STTC is small, when the diversity order is large, trace criteria applies. Set partition idea was extended to symbol group. A set of design rules are developed to construct optimal STTC. The optimality is proved as well.This dissertation also provides simulation results of optimal STTC over other claimed STTC. The simulation results showed that the optimal STTC outperformed all other codes. And at the same times, using the simulation results, the effect of number of transmitters and number of receivers on the performance of STTC are also studied.This dissertation presents an overview of Multiple Input Multiple Output (MIMO) system. A simple mathematical model is used to describe MIMO system and system capacity improved is derived. Various Benefits achievable by MIMO system are discussed. History and open problems in this field are presented as well.Finally, open problems for future research are discussed.