Aloys Mvuma Shotaro Nishimura Takao Hinamoto Adaptive IIR notch filter with controlled bandwidth for narrow-band interference suppression in DS CDMA system. 361-364 2003 ISCAS (4) http://dx.doi.org/10.1109/ISCAS.2003.1205848 db/conf/iscas/iscas2003-4.html#MvumaNH03