Patent ID: 7835457
Filing Date: 2010-11-16
Classification: H04S

Abstract:
1. A method for demodulating a received signal in a circuit arrangement, the method comprising: defining the received signal to comprise phase-shift modulated or amplitude-quadrature modulated individual part-signals which are transmitted in a plurality of different frequency bands, wherein the individual part signals are separate from each other and each include different pieces of data; processing the received signal in a plurality of stages in succession, the plurality of stages including a first stage and succeeding stages, the succeeding stages including a last stage, the processing including: multiplying all input signals to each of the stages by two respective mutually orthogonal signals to form two intermediate signals for each input signal; wherein the intermediate signals in each of the stages except the last stage act as the input signals to whichever is the succeeding stage in the particular case and the received signal acts as the input signal to the first stage; and determining an in-phase and/or a quadrature component for each of the phase-shift modulated or amplitude-quadrature modulated individual part-signals transmitted in the plurality of different frequency bands by calculating a linear combination of intermediate signals from the last of the plurality of stages.