Patent ID: 8223901

Claim:
An apparatus, comprising: a wideband receiver configured to receive a wideband signal comprising both a wanted signal and narrowband interference; an interference detection unit configured to detect the presence of the narrowband interference in the time domain, wherein the interference detection unit comprises a set of sub-band filters, said interference detection unit further configured to process the wideband signal to detect a sub-band containing the narrowband interference, wherein detecting the sub-band containing the narrowband interference comprises selecting an output of a sub-band filter of the set of sub-band filters whose energy level is less than an energy level output of the other sub-band filters of the set of sub-band filters and determining whether a difference between the energy level of the selected output and an energy level of the wideband signal exceeds a threshold; a packet detection and synchronization unit configured, when narrowband interference is detected, to perform packet preamble detection and synchronization in the time domain using an output of a sub-band filter of the set of sub-band filters that filters the sub-band containing the narrowband interference from the wideband signal; and an interference cancellation unit configured, when narrowband interference is detected, to generate a time domain signal representing the wanted signal, for use in data extraction in the frequency domain, by estimating at least one parameter of the narrowband interference using time domain samples and subtracting a waveform generated using the at least one estimated parameter from the wideband signal.