Optical wireless communications for broadband access in home area networks od Langer, K, Grubor, J, Bouchet, O, El Tabach, M, Walewski, J, Randel, S, Franke, M, Nerreter, S, O'Brien, D, Faulkner, G, Neokosmidis, L, Ntogari, G, Wolf, M