a method for generating a signal having a frame structure , each frame of the frame structure comprising at least one useful symbol , a guard interval associated to the at least one useful symbol and a reference symbol , comprises the steps of performing an amplitude modulation of a bit sequence such that the envelope of the amplitude modulated bit sequence defines a reference pattern of the reference symbol and inserting the amplitude modulated bit sequence into said signal as said reference symbol . a method for frame synchronization of a signal having such a frame structure comprises the steps of receiving the signal , down - converting the received signal , performing an amplitude - demodulation of the down - converted signal in order to generate an envelope , correlating the envelope with a predetermined reference pattern in order to detect a signal reference pattern of the reference symbol in the signal , and performing the frame synchronization based on the detection of the signal reference pattern .