Analysis of the Loading Factor Behavior in a LSMI Beamformer

Diagonal loading imparts robustness to adaptive beamformers. With it, the algorithm improves both its capacity of sidelobes attenuation and the signal-to-interference-plus-noise- ratio (SINR). However, setting the appropriate loading factor γ value is not a straightforward task as it is dependent on various parameters. Therefore, this paper aims to establish its behavior related to changes in certain parameters - i.e., number of antennas, number of interferers, noise power and direction-of- arrival (DOA) uncertainty. This way, the value that gives suitable SINR results can be established.