The effect of total noise on two-dimension OCDMA codes Layth A. Khalil Al Dulaimi, R. Badlishah Ahmed, Naimah Yaakob, Syed A. Aljunid and Rima Matem EPJ Web Conf., 162 (2017) 01027 Published online: 22 November 2017 DOI: 10.1051/epjconf/201716201027