Patent ID: 8705675

Claim:
A radio frequency signal reception device comprising: a transposition device of signals of frequency f RF to a first intermediate frequency IF 1 <f RF ; a first bandpass filter centered on IF 1 of signals transposed to IF 1 ; a sampler at a frequency fs<IF 1 of signals delivered by the first filter, transposing the signals delivered by the first bandpass filter to a second intermediate frequency IF 2 =α·fs/M+fs/(M·n), wherein M is a decimation factor and n is a ratio between fs/M and a third intermediate frequency IF 3 ; a second discrete-time filter centered on the second intermediate frequency IF 2 of samples delivered by the sampler; a decimation device of the factor M of samples delivered by the second discrete-time filter, transposing the samples delivered by the second discrete-time filter to the third intermediate frequency IF 3 =fs/(M·n); an analog-digital converter, operating at a frequency fs/M, of samples delivered by the decimation device, where α, n and M are strictly positive real numbers chosen such that: α< fs /(2 ·BW ch ·M ), and BW ch /2 <fs /( M·n ), with BW ch : bandwidth of a channel of the received RF signals.