Wenjin Wang 0001 Xiqi Gao 0001 Fu-Chun Zheng Offset modulated single-carrier FDMA with flexible user bandwidth. 5004-5009 2012 GLOBECOM https://doi.org/10.1109/GLOCOM.2012.6503913 conf/globecom/2012 db/conf/globecom/globecom2012.html#WangGZ12