用菲涅尔区板天线实现来波方向的鲁棒性估计

ROBUST ESTIMATION FOR THE DIRECTION OF ARRIVAL BY FRESNEL ZONE PLATE ANTENNA

针对蜂窝移动通信局域散射电波传播的空间分布源模型 ,研究了应用菲涅尔区相位修正平面聚焦结构和馈源阵列的组合形成的一种新型多波束自适应天线 .基于广义MUSIC算法及极大似然估计算法 ,分别实现相干及非相干的空间分布式源信号来波方向及其角度扩展参数的鲁棒性估计问题 .数值仿真计算结果表明 ,在这一无线传播环境中 ,基于菲涅尔区相位修正平面聚焦结构在减小相关参数估计的RMS误差等方面 ,其性能优于传统的均匀直线阵列模型 .因此基于该新型自适应天线 ,可以实现来波方向的鲁棒性估计 .

A novel multi-beam adaptive antenna was investigated by considering the spatially distributed source model for local scattering radio propagation in cellular mobile communications. This antenna is consisted of a focusing configuration with Fresnel zone phase - correcting plate ( FZP) and feeding array. The robust estimation of parameters ( direction-of-arrival ( DOA) and angular spread) was studied based on the generalized MUSIC algorithm and the maximum likelihood estimation in the case of coherently and incoherently spatially distributed source respectively. Simulation results show that the FZP configuration outperforms the uniformly linear array ( ULA) in reducing the estimation errors of the RMS in the considered propagation environment. Therefore a robust estimation of DOA can be achieved with this novel adaptive antenna.