Patent ID: 7324618

Claim:
A receiving apparatus of a wideband mobile communication system, comprising: a down converter for down converting a received signal into a baseband signal; an analog-to-digital converter for converting the baseband signal into a digital signal; a decimation filter for decimating the digital signal according to a pre-selected decimation ratio; an interference canceller for detecting narrow-band interference signals contained in a digital output of the decimation filter and canceling the narrow-band interference signals, comprising: a detector for detecting the narrow-band interference signals contained in the output of the decimation filter, and generating control signals and corresponding carrier frequencies according to the detected narrow-band interference signals, comprising: a fast Fourier transformer (FFT) for fast-Fourier-transforming the output of the decimation filter; a comparator for comparing energy levels of the fast-Fourier-transformed signals with a threshold value, and identifying signals having an energy level greater than the threshold value to be the narrow-band interference signals; a sorter for sorting the narrow-band interference signals generated from the comparator in order of energy level; and a selector for selecting the narrow-band interference signals in order of high energy level among the sorted narrow-band interference signals, and generating the carrier frequencies corresponding to the selected narrow-band interference signals; and at least one interference cancellation filter for operating in response to each of the control signals, and canceling the narrow-band interference signals contained in the output of the decimation filter by the carrier frequencies; and a demodulator for demodulating an output of the interference canceller.