Patent ID: 8514990

Claim:
An automatic gain control device for satellite positioning receivers comprising at least one radiofrequency module returning a filtered radiofrequency signal representative of the signals received by an antenna and amplified by a variable gain amplifier comprised in the radiofrequency module, an analog-digital converter returning digitized samples of the radiofrequency signal, and a signal processing module processing the digitized signal, the automatic gain control device being implemented in the signal processing module and performing a closed-loop control returning a gain control signal for the variable gain amplifier, and comprising means for estimating the temporal occupancy rate of the pulses within the useful band, means for estimating a characteristic quantity chosen from within the group comprising the amplitude and the power of the sampled signals, the temporal occupancy rate of the pulses within the useful band determining the weighting respectively applied to the negative and positive differences resulting from a comparison between the characteristic quantity of the digitized samples and a setpoint value C AGC by a non-linear function module, the signals coming from the non-linear function module being integrated over a given period in order to form the said gain control signal.