【作者】 丁杰伟；

【导师】 傅丰林；

【作者基本信息】 西安电子科技大学 ， 通信与信息系统， 2002， 硕士

【摘要】 在无线通信中，智能天线可以充分利用信号空间特性提高系统性能，但现在还没有大规模商用的智能天线系统。本文研究了在第三代移动通信WCDMA系统中的智能天线应用。首先从天线阵列导向矢量相关性的角度阐述了智能天线的空分原理，然后根据这个原理提出天线阵列空分能力表达式。接着提出了弧形智能天线阵列结构，分析了弧形阵列的独特优点，并把直线阵和圆阵统一到弧形阵列结构体系中。然后提出了阵列优化准则和方法。本文结合3GPP协议针对WCDMA系统推导出了四种自适应算法，并对这些算法作了仿真比较，结果证明这些算法有效的。本文提出了频分双工系统中应用的收发权值线性转换方法。最后把智能天线技术和RAKE接收技术、收发分集技术紧密结合，形成比较完整的智能天线系统基带结构。更多还原

【Abstract】 In the wireless systems, smart antenna techniques use the signal’s spatial signature to improve system performance. But up to now there is still no commercial smart antenna system in large use. In this paper, the applications of smart antennas in WCDMA system are discussed. First, the spatial division theory of smart antennas is proposed based on the relativity of the steering vectors of antenna array, then the spatial division capability of antenna array is presented. A new topology of antenna array named arcuate array is proposed. As the analysis shows, the arcuate array has its particular advantages, and the linear array and circular array can be unified into arcuate array family. The criterion and method for the optimization of antenna array topology are obtained. According to the protocols of 3 GPP, this paper present four adaptive algorithms for WCDMA system. Results of algorithm simulating show that these algorithms are efficient. This paper also propose the linearity transform method which is used to get downlink weight vector from uplink weight vector. At last, the baseband system structure which deploys smart antenna, RAKE, and receive/transmit diversity techniques is proposed.更多还原