建立了一种空时信号传输模型，分析对比了递归最小二乘（RLS）和最小均方误差（LMS）两种算法后，提出了一种基于RLS算法，由智能天线和时域均衡器组成的采用后馈滤波器的空时联合均衡器。仿真结果表明，在多径衰落信道下该方法能有效改善系统抗干扰能力，算法简单且易于实现。

Interference cancellation is made available by using smart antenna at cellular base stations. Well-distributed cumulative probability of signal-to-interference plus noise power ratio appears to be vital for cellular mobile multimedia communications. A scenario of dual links dynamic power control combined to a solution of smart antenna is proposed to adjust the instant transmission power in terms of the disparity from the favorite range. Simulation results show that this method is quite effective to improve the cumulative distribution probability performance. Meanwhile, accompanying low power consumption is also obtained at both base stations and mobile stations.

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。