Apostolos Karadimitrakis was born in Mytilene, Greece. Obtained his B.Sc. degree in Physics from National and Kapodistrian University of Athens (NKUA), an M.Eng in Electronics and Radio-communications from Department of Physics (NKUA). He worked at the ATE Bank, IT department and later served as a research assistant at the University of Kiel, Germany, on optic fiber communications. He is currently a researcher at the Technological Education Institute of Piraeus, Greece and he is pursuing his PhD degree at NKUA, Greece, under the supervision of Prof. Aris L. Moustakas. His PhD thesis is related to the topic of information theory and MIMO techniques in optic fiber.