Chia-Chin Chong Fujio Watanabe Hiroshi Inamura Dandan Wang Hlaing Minn Naofal Al-Dhahir On the performance comparison of VSF-OFCDMA and OFDMA. 1-6 2008 PIMRC http://dx.doi.org/10.1109/PIMRC.2008.4699446 conf/pimrc/2008 db/conf/pimrc/pimrc2008.html#ChongWIWMA08