【摘要】 发射分集是近年来才发展起来的一种技术 ,在第三代移动通信系统中已经开始普遍采用。本文简单介绍了几种发射分集技术 ,并分析了各自的优缺点。特别针对发射信号设计的新技术 -空时码进行了详细讨论 ,然后论述了WCDMA中发射分集技术的应用 ,并进行了性能仿真比较。更多还原

【Abstract】 Transmit diversity(TD) scheme is a key technique in wireless communication, which has been widely adopted in 3G wireless communication systems. Various TD schemes are introduced in this paper, including their features and also especial attention on space-time codes. Then, we emphasize on applications of TD to WCDMA, including the performance simulation and conclusion.更多还原