On the performance and capacity of space-time block coded multicarrier CDMA communication systems

Future wireless mobile systems are required to transport multimedia traffics at much higher bit rates and this motivates the author to work on the suitable candidate technology, space-time block coded (STBC) multicarrier (MC-) CDMA, for next generation of wireless mobile communication systems. The thesis first investigates the bit error ratio (BER) performance and bandwidth efficiency of STBC MC-CDMA systems in the presence of carrier frequency offset (CFO). Then various multirate access schemes, multicode, variable spreading gain (VSG) and multiple symbol rate (MSR), are investigated. Next, the thesis looks into some of design and implementation issues of STBC MC-CDMA systems. First, the timing and frequency synchronization is studied. A subspace-based blind joint timing and frequency synchronization algorithm is proposed. After all the mobile users have adjusted and achieved synchronous transmission, the semi-blind channel estimation and linear multiuser detection are performed to recover the data at the receivers of base station

Author dc:creator

• HU XIAOYU

• MC-CDMA, Space-Time Coding, MIMO, Synchronization, Channel Estimation, Multiuser Detection