Patent ID: 8345730

Claim:
A method for reducing an interference signal interfering with a broadband spread-spectrum signal reaching a receiver, said receiver including an interference signal reduction system including: an automatic gain controller having: at least one amplifier and a gain control, and an analog-to-digital converter, and a weighting unit placed at the output of the automatic gain controller, said method comprising the steps of: continuously carrying out, by the automatic gain controller, a normalization of an instantaneous peak amplitude of the interference signal, such that said instantaneous peak amplitude is constant in time for the normalized interference signal, converting the normalized interference signal into a sinusoidal interference signal when the interference signal is narrow-band, the normalized interference signal being a Gaussian interference signal, when the interference signal has a bandwidth wider than a narrow-band, carrying out, by the analog-to-digital converter of the automatic gain controller: one of digitizing of the normalized interference signal, using at least two bits, thereby creating a sign bit and at least one amplitude bit, and creating a type bit which differs according to whether the normalized interference signal is sinusoidal or Gaussian, the type bit being a Gaussian bit, when the normalized interference signal is a Gaussian interference signal, the type bit being a sinusoidal bit, when the normalized interference signal is a sinusoidal interference signal, and the weighting unit weighting the digitized normalized interference signal output by the automatic gain controller, according to the type bit, using an assignment table stored in a memory of the weighting unit.