【摘要】 在Butler阵的基础上,设计了一种适用于Ad hoc网络移动终端上的混合型智能天线结构,提出了一种将Butler阵和数字信号处理波达角(DOA)估计算法结合在一起的超分辨波束形成算法.用该算法理论推导出了天线对准期望信号方向时移相器的角度公式.仿真结果表明,与传统的Butler阵相比,该算法既利用了Butler阵简单易行的结构特点以及波束形成简单的优点,又使天线阵的主瓣可随着信号的来波方向进行调整,信号接收质量有了很大提高,并降低了电磁骚扰信号的影响.更多还原

【Abstract】 Based on Butler matrix,a novel simple-structured hybrid smart antenna system applicable in Ad hoc network terminals is designed.A super-resolution beamforming algorithm is also presented by combining with the direction of arrival(DOA) estimation algorithm of digital signal processing(DSP).By this algorithm,it is deduced the shift value formula of the variable phase shifter when the antenna array switches to the direction of the desired signal.Simulation results show that the system facilitates the implementation by use of the simple system structure and easy beamforming feature.And it can drive the antenna to follow the input signal,which can greatly improve the signal quality and suppress the electromagnetic interference.更多还原