说明：  电子通信系统的建模与仿真 第9章 天线及智能天线仿真 9.1 全向天线的波束下倾 9.2 天线阵的波达方向估计 9.3 天线阵的波束形成
(Electronic communications system modeling and simulation of Chapter 9 of the antenna and smart antenna simulation 9.1 omnidirectional antenna beam antenna array under the dump 9.2 Direction of Arrival Estimation 9.3 Antenna Array Beamforming )