基于鲍威尔法的快速盲波束形成方法  

Fast Blind Beamforming Method Based on the Powell Algorithm

作　　者：李佳靖[1] 金荣洪[1] 耿军平[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《武汉理工大学学报》2007年第8期117-120,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(F010402/60501016)

摘　　要：针对阵列输出功率最大化的准则,提出了一种基于鲍威尔法的快速盲波束形成方法。该方法通过检测阵列天线的输出功率,构造用于搜索最优权向量的共轭方向,自适应地调整阵列天线中各阵元的相位,形成稳定性波束动态跟踪期望用户。数值仿真结果表明,该方法与同类方法相比,提高了波束形成的稳定性,减少了计算量,并在同等收敛精度下具有更优的方向图,该文方法的迭代次数和乘法次数约为同类方法的10%。A fast blind beamforming algorithm based on the Powell algorithm for maximization of the array output power was presented.Through detecting the array output,the conjugate searching directions for the optimum weight were determined.The phase of each element was shifted thus a beam was formed towards the desired user.Simulation results show that the proposed algorithm enhances the stability of beamforming and immensely reduces the computational load compared with available methods in literatures.Furthermore,it leads to a better beampattern with fewer requirements on the convergence criteria.The round of iterations and multiplications by this method is approximately 10% of the relevant methods.

关 键 词：智能天线 阵列输出功率 波束形成 鲍威尔法 

分 类 号：TN821[电子电信—信息与通信工程]