IMPROVED CONTINUOUS PHASE MODULATION METHOD AND EMITTER IMPLEMENTING SAID METHOD

摘要

A continuous phase modulation method comprising the following steps: .cndot. receiving (101) a sequence of digital data symbols a(n) to be emitted; .cndot. transforming (102) 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 f; .cndot. filtering (103) the sequence of transformed symbols b(n) with a shaping filter and modulating (104) the filtered sequence with a phase modulator, .cndot. said transformation Tf being defined so as to minimize interference between modulated symbols filtered by a receiving filter.