Performance of Multicarrier CDMA Technique Combined with Space-Time Block Coding over Nakagami Channel

• Main Authors: Yenshu Wang, 王彥舒
• Other Authors: Juihsiung Chou
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/34072345984634642145

碩士 === 中華技術學院 === 電子工程研究所碩士班 === 92 === With a surging increase in demands for wireless communications, there is a growing need for technological innovations to satisfy these demands. Multicarrier code division multiple access (MC-CDMA) seems to be a good candidate for future mobile wireless communications due to its capability of high transmitting data rate and robustness to channel fading. In this thesis, the performance of an asynchronous MC-CDMA system using transmits diversity in uplink Nakagami fading channel is studied. The diversity scheme is based on Alamouti’s space-time block code (STBC) that exploits both the temporal and the spatial domain to obtain diversity, while preserving the transmission rate and thus not affecting the bandwidth efficiency. The simulations show that the performance of an asynchronous MC-CDMA system with two transmit antennas and two receive antennas is superior to that of using two transmit antennas and one receive antenna in both uplink and downlink.