Simplified Adaptive Model Tree for Behavioral Modeling of Millimeter Wave Beamforming Transmitters in Dynamic Configurations

A simplified adaptive model tree (SAMT) for over-the-air (OTA) behavioral modeling of millimeter-wave (mmWave) beamforming transmitters in time-varying transmission configurations is proposed in this paper. The SAMT model significantly reduces its algorithm complexity and running complexity by simplifying sub-models of the AMT model to overcome the problem of high complexity when the AMT model is applied to mmWave beamforming transmitters. The SAMT model inherits the advantages of the AMT model and can model the behavior of the main beam of the transmitter in different beam directions using only one model. The experimental results confirm that the SAMT model has similar modeling performance and lower complexity than the AMT model for the main beam of different beam directions of the transmitter.