The device of reception, 1984, based on a comparator in the input

摘要

The present invention relates to a digital processing device to the input of a radiofrequency receiver system, adapted to a transmission system using a direct sequence spectrum spreading, comprising means of analog - digital converter (adc) operating a - sampling of a received signal with a covering of the useful signal by the noise of the transmission channel, the demodulation means (34) coupled to the output of the adc, a low pass filter - coupled at the output of the demodulation means and a filter (36) adapted to the spreading code used, characterized in that the adc comprises a comparator (38), adapted for comparing the amplitude of the signal in - sampled at a reference (ref) in order to carry out a quantization of the signal on one bit, the said comparator giving rise to the creation of a quantization noise, and in that it comprises a block of additional filtering (37) disposed between the low pass filter - and the matched filter, using a matched filtering stochastic multi - noise.