通道误差对波束形成性能的影响分析

摘要

阵列信号中通道误差的存在会影响波束形成算法的性能，使其不能正常工作。通过对通道间及通道带内幅相误差建模，分析其对波束形成的影响。通过对波束形成算法理论分析并结合实际应用情况，通道间幅相误差影响波束形成的波束幅度，不影响波束相位；通道带内幅相误差，会同时影响波束幅度和波束相位。本文给出通道带内误差的校正方法，通过计算机仿真证实本文所分析结果的正确性。%The capability of adaptive beam forming algorithm is affected by the channel error of array signal. According to the error modeling of amplitude phase in the channel, the influence on the beam forming is analyzed. Though the theory analysis and the practical application, the amplitude phase error in channels affect the range but not affect the phase. The amplitude phase error in channels band affect both range and phase. The channel calibration method is given in this paper. The simulation result shows that the validity of the proposed analysis.