a system that incorporates teachings of the subject disclosure may include , for example , a method for analyzing a wide frequency band with respect to signal power levels in specified narrow frequency bands , detecting narrow band signal power levels received in the specified narrow frequency bands , determining an average composite wideband power level from the narrow band signal power levels , determining an adaptive threshold from the average composite wideband power level , detecting narrow band interference according to the adaptive threshold , and configuring a filter to substantially suppress the detected narrow band interference . other embodiments are disclosed .