多入多出系统测向精度与空域相关分析

摘要

分析了多人多出系统测向精度问题.提出了天线接收端利用圆形天线阵的布阵形式.精度分析是在该阵列形状下进行的.理论上分析了天线阵列形式与角度估计之间的关系.并在此条件下,分析了影响角度估计精度的各个参数.在此基础上推导了角度估计精度公式,通过计算机仿真进行验证.并将该种阵列形式与常规的阵列进行了对比,为以后多入多出天线系统的构建提供了一定的参考参数.以及在对 MIMO 系统性能进行评估时,影响评估参数的影响因子.%The precision of DOA estimation is mentioned. A model of circule antenna array is present. With the adaptive array, the signals received by multiple antennas are optimally weighted. The effect of error estimation of direction of signal arrival is investigated. The precision of DOA estimation was limited by many factors in practice. Plane circular antenna array was analyzed, which was used as estimation of two dimensional DOA (direction of arrival signal). At the same time, the precision of DOA estimation formula was given and the formula was proved correct by computer simulation. From the formulas, it could be seen that the precision of DOA estimation was related with many factors. The results of simulation demonstra-ted that, the precision is affected by the effect of the data of wavelength to radius of the circularity and the direction of arrival signals.