Patent ID: 7139535

Claim:
A method of signal processing of an amplitude-modulated or phase-modulated high-frequency signal (RF signal), comprising the steps of: (a) breaking the RF signal down into two signals (FM 1 and FM 2 ) by relative phase displacement by an angle of +β and −β; (b) amplifying the signals to form two amplified signals; (c) adding the amplified signals to form a transmission signal, wherein: step (a) comprises multiplying a phase-modulated RF signal with constant envelope curve in a first branch by cos β and in a second branch by sin β and the two signals FM 1 , FM 2 , are obtained by respective summation and subtraction of the multiplied signals; the RF signal is obtained from two amplitude-modulated and phase-modulated input signals (x 1 (t), x 2 (t)) by quadrature modulation, wherein the individual signals after modulation by a sine and a cosine are added; the input signals (x 1 (t) and x 2 (t)) are scanning values; and in the case of approach of the scanning values of the input signals (x 1 and x 2 ) towards or through zero or when an envelope curve signal (A(t)) goes towards or through zero the received signals(x 1 , x 2 ) are replaced by input signals modified by means of subtraction of adjacent scanning values.