一种改进的智能天线盲波束形成算法

将空分多址技术引入无线通信系统中,针对无线电信号普遍具有的循环平稳特性,提出了非线性条件下的改进盲波束形成算法。通过对算法的权向量进行再次优化,改善了方向图零陷的位置和深度,提高了输出SINR。优化算法的输出SINR对导引向量随机误差具有稳健性,对期望信号的功率变化表现出不敏感的特性,算法具有很好的理论价值以及应用前景。理论分析与计算机仿真实验都证明了算法的有效性。

Improved blind beamforming algorithm of smart antenna

An improved blind beamforming of smart antenna used by wireless communication system was presented.Nonlinear constraint method was used to optimize the weight vector of adaptive pattern to improve the robust characteristics and to optimize the position and the deepth of null.The final solution of weight vector was different from alterably diagonal loading and the unknown parameter in optimal solution could be obtained easily and accurately.The SINR(signal to interference plus noise ratio) of the new algorithm had robust characteristics for random steering vector errors and was not sensitive to power change of SOI(signal of interest).Simulation results prove the validity of the new algorithm.