High-efficiency BPSK signal demodulation technology

A method formodulating and demodulating PSK signals, and particularly a device BPSK for demodulating BPSK signals comprising: - a signal splitter (1) through which an input signal (10) with two bits which encode a type of transition technique, selected from direct multiplication, constant envelope with positive frequency shift and constant envelope with negative frequency shift, is injected into four second-harmonic injection-locked oscillators (ILO1, ILO2, ILO3, ILO4 ); - the four second-harmonic injection-locked oscillators (ILO1, ILO2, ILO3, ILO4 ), locked to the input signal (10) in absence of bit transitions; - two conversion mixers (M1, M2) to obtain respectively the output signals (BHF, BLF), both down-conversion mixers (M1, M2) comprising a mixer (2) and a low-pass filter (3); - means for detecting whether there is a bit transition in the output signals(BHF, BLF) and if so, determining the type of transition technique used for modulating the input signal (10).