Kai Xing Xiuzhen Cheng Liran Ma Qilian Liang Superimposed code based channel assignment in multi-radio multi-channel wireless mesh networks. 15-26 2007 conf/mobicom/2007 MOBICOM http://doi.acm.org/10.1145/1287853.1287857 db/conf/mobicom/mobicom2007.html#XingCML07