Dear Lomax,
Yes, it is possible to predefine pico-base station positions. Currently we only support ‘homogenous density’ and ‘constant femtos per cell’ for small cell distribution, however easily you can add more cases, by modifying +network_generation/add_femtocells.m (adding a new case for LTE_config.femtocells_config.spatial_distribution; lines 10 – 27) and defining this new case in +spaial_distibutions. Or you can just overwrite the parameter femtocell_pos in the same file, by adding the desired coordinates in x and y.
Best regards,
Fjolla