Patent ID: 6937676

Claim:
An interference-signal removing apparatus for removing narrow-band interference signals from input signals including wide-band desired signals and the narrow-band interference signals, comprising: extraction means for extracting the interference signals from the input signal; removal means for removing the extracted interference signals from the input signal; extraction control means for controlling extraction of the interference signals by the extraction means in accordance with a removal result of the removal means; and extraction-amount suppression means for suppressing the interference signal amount to be extracted by the extraction means in accordance with the input signal; wherein the extraction control means computes a control vector constituted of a plurality of digital control values for controlling extraction of interference signals and outputs the control vector to the extraction means, the extraction means extracts the inner product of an input vector constituted of a plurality of input signal values and the control vector output from the extraction control means as an extracted interference signal, and the extraction-amount suppression means restricts the effective word length of a digital control value constituting the control vector output from the extraction control means and suppresses the interference signal amount to be extracted by the extraction means.