多用户波束优化设计在智能天线系统中的应用

MultiUser Optimum Beamforming in Smart Antenna System

本文讨论了智能天线系统中的下行波束形成问题。智能天线可以通过阵列天线技术在同一信道中利用多个波束同时给多个用户发送不同的信号，以提高通信容量和质量。本文提出了蜂窝小区移动通信体制下波束形成的约束模型，并基于该模型利用Ｃｈｅｂｙｓｈｅｖ线阵实现多波束优化设计。理论分析及仿真结果表明，与目前其它方法相比，该方法具有空间分辨力高、计算量小、稳健性好等优点，有较强的实用性。

The issue of downlink multiple beamforming in the Smart Antenna System is addressed here. With the antenna array, SAS is capable of transmitting multiple cochannel signal to several receivers so that each receiver gets its intended signal with minimum crosstalk from the remaining signals. In this paper, a new constraint model is presented for the cellular mobile communication system. Based on that model Chebyshev array is applied to get optimum solution for multibeam designation. The theoretical analysis and the simulation results show that, compared with other methods, this method has advantage of higher spatial resolution, less computation and better robustness, therefore is more practical.