On line calibration method based on adaptive nulling antenna

摘要

Due to the problem of channel inconsistency in the adaptive nulling antenna, based on the analysis of the performance's effect of the channel amplitude and phase error to the nulling antenna and the establishment of channel calibration model, an on-line calibration method for nulling antenna is proposed. A calibration signal is transmitted through the calibration antenna. The channel error estimation is carried out by the amplitude and phase of the calibration signal received by the array element and the transmitted signal. The calibration of each channel is performed by the estimated value. Based on this method, the array element channel can be on-line calibration. The impact of environmental factors on each channel is also reduced to a minimum. Simulation results show that the proposed method can effectively improve the channel inconsistency and improve the performance of the antenna.