Optical wireless communications for broadband access in home area networks by 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