Patent ID: 9712346
Date: 2017-07-18
CPC Classifications: H04B,H04L

Claim:
1. 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 a 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 weighted sum of at least two differences between two consecutive symbols of the sequence to be emitted, transformed by an application of a non-linear function f; 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.