介绍了一种适用于时分双工蜂窝移动系统、基于非线性判决反馈均衡器和递归最小平方算法的环形自适应阵列天线。研究了阵列波束对期望信号的增强和对干扰信号的抵消的形成过程，并分析了方向增益的收敛属性与训练序列的关系。计算机仿真结果表明了波束形成与接收信号到达角度之间的联系，发现了波束收敛所需训练序列的最佳长度。

In this paper, an 8-elment adaptive array,which based on non-linear decision feedback equalizer and recursive least square is introduced for the post 3rd Generation TDMA/TDD mobile communications. The forming of beam pattern is declared the performance of boosting up the desired directions and canceling down the interference directions. Then the relationship between training sequence and beam pattern convergence is analyzed. Computer simulation results show the affiliation of beam forming and the directions of arrivals. The best length of training sequence for bean convergence is found.

Spatial-temporal channel simulator is necessary for proper designing, analyzing and implementing multi-antenna system. A new geometrical based spatial-temporal channel simulator is proposed, which assumes double bounce scattering components are dominant multipaths received by base station and mobile as well as single bounce scattering components. Considering that scatterers from different distances to mobile influent signal propagation dissimilarly, two different scatterers distribution densities within the coverage area are put into application. Comparition of an example of urban channel simulation with measurement results shows that the simulator is capable to characterize most of properties of urban channel. The simulator can also be configured to meet the different requirement of angle spread and delay spread for estimating the robust of multi-antenna system。

为获得更高的信息速率，提出空时分组码（STBC）与16-DAPSK技术相结合的方案。得到采用双发单收空时分组码情况下的16-DAPSK最优幅度分割因子，并基于该最优值得到Rayleigh和Rician衰落信道上的误码率特性曲线。仿真结果表明，将16-DAPSK与空时分组码结合在一起可以获得很高的编码增益。

智能天线是移动多媒体通信亟待解决的关键技术，本文研究了一种适用于时分双工蜂窝系统，基于非线性判决反馈空间均衡器和递归最小平方算法的智能天线。提出了双向链路信号对干扰加噪声功率比的算法以及阵列波束方向增益和信干比累积分布函数两种性能评估方法。仿真结果表明：该智能天线可以抵消同波道干扰，改善信干比，减小频率复用系数。