Patent ID: 6879273

Claim:
Method for digitally transmitting analog signals, in which oversampling is performed, comprising the following steps: a) inputting an analog input signal into an analog/digital converter; b) mixing of the analog input signal mixed with signal in a summing device; c) quantizing the analog input signal mixed with the noise signal in a quantizing device, which provides a digital signal; d) filtering the digital signal obtained in a decimation filter unit, which provides a digital transmission signal with a reduced bandwidth; e) transmitting the digital transmission signal with the reduced bandwidth; f) supplying the transmitted digital transmission signal to a mixing unit; g) mixing the digital transmission signal with a receive noise signal in the mixing unit; h) post-quantizing the digital transmission signal mixed with the receive noise signal in a post-quantizing unit which provides a post-quantized signal; i) interpolating the post-quantized signal in an interpolation filter unit which provides an interpolated signal; j) amplifying the interpolated signal in an amplifier unit which provides an amplifier output signal; k) adapting the amplifier output signal in a second noise shaping device; l) post-filtering the amplifier output signal adapted by the second noise shaping device in a post-filtering device; and m) outputting an analog output signal out of the post-filtering device, wherein the method comprises the further step: n) performing a first noise shaping by means of a first noise shaping device, arranged between the analog/digital converter and the decimation filter, which is combined with a second noise shaping performed in the second noise shaping device, the first noise shaping performed in the first noise shaping device providing an allocation of noises in individual frequency bands.