Xue Li Ruolin Zhou Jian Zhang Bin Wang Zhiqiang Wu High performance frequency division MC-CDMA system via carrier interferometry codes. 1126-1130 2009 IWCMC http://doi.acm.org/10.1145/1582379.1582626 conf/iwcmc/2009 db/conf/iwcmc/iwcmc2009.html#LiZZWW09