Patent ID: 7796716

Claim:
A method of eliminating a narrowband interference signal in a receiver, wherein said narrowband interference signal is present in a band of interest in which a signal of interest is also present, wherein said signal of interest represents a preamble portion of a packet encoded in said input signal, said method comprising: receiving an input signal containing said signal of interest and said narrowband interference signal, wherein said preamble portion contains channel-distorted training symbols transmitted by a transmitter of said packet; subtracting said signal of interest from said input signal to generate a residue signal, wherein said subtracting removes the frequency components representing said channel distorted training symbols from said input signal to produce said residue signal; determining any interference band in which said narrowband interference signal is present in said residue signal; and removing frequency components corresponding to said interference band from said input signal to eliminate said narrowband interference signal from said input signal.