METHOD FOR DIGITIZING AN ANALOGUE SIGNAL FOR FURTHER DEMODULATION IN A RADIO RECEIVING DEVICE

摘要

The invention proposes a digital receiving architecture wherein the sample rate converter is designed based on a first stage consisting of a Farrow structure followed by a decimator. This way, it is possible to use the same decimator for a given RAT mode regardless the actual ADC sample rates. The Farrow structure compensates for ADC sampling rate variations by delivering data at a fixed rate at the decimator. Considering that the distortion is introduced by the decimator and not the Farrow structure as long as the latter is used in a reasonable range of conversion ratio, the potentially high number of configurations that have to be taken into account by the equalization stage is considerably reduced.