DEMODULATION STRUCTURE AND METHOD

摘要

The present invention relates to a demodulation structure and method fo r downconverting and demodulating a digitally modulated signal S0, with a loca l oscillator means for providing a local oscillator signal Slo a mixer means for mixing said local oscillator signal Slo and said digitally modulated signal S0 in order to obtain a mixed signal, a lowpass filter means for lowpass filtering the mixed signal from the mixer means and an analog-to-digital converting means for converting the filtered signal from the lowpass filter means into a downconverted and demodulated digital signal S1, whereby the local oscillator signal is se t in respect to the modulated digital signal so that the downconverted and demodulated digit al signal output from the analog-to-digital converting means comprises two serially arranged information parts. The present invention provides a demodulation structure a nd method with a very simple structure and essentially improved amplitude and phase imbalances.