Continuous phase modulation method and emitter implementing said method

A continuous phase modulation method comprising the following steps:

• receiving a sequence of digital data symbols a(n) to be emitted;
• transforming the sequence of symbols a(n) to be emitted into a transformed sequence of symbols b(n), each symbol b(n) of which is equal to the sum of a symbol a(n) to be emitted and of a corrective factor equal to a transformation Tf applied to a plurality of differences (a(n)-a(n−1)) between two consecutive symbols to be emitted, the transformation Tf applied being a combination c of at least two differences between two consecutive symbols of the sequence to be emitted, transformed by the application of a non-linear function ƒ;
• filtering the sequence of transformed symbols b(n) with a shaping filter;
• and
• modulating the sequence of filtered symbols with a phase modulator in order to obtain a sequence of modulated symbols,
• said transformation Tf being defined so as to minimize interference between modulated symbols filtered by a receiving filter.