WO 2025/132968 A1: Methods, Devices and Programs for Adaptive Modulation and Demodulation of a Data Frame

Abstract

The invention relates to a method for demodulating a frame comprising N information words $[P_0, ..., P_{N-1}]$, in which a word $P_i$ at a position $i \in [0, N-1]$ in the frame is modulated by a symbol $C_{p_i}$ from a dictionary of $K$ symbols. The method is characterised in that it comprises steps of: obtaining (300) a priori knowledge about the distribution of symbols at a plurality of positions in the frame; determining (301) a differential representation of the a priori knowledge; determining (303) a differential representation of the received frame; linking (304) the determined differential representations in order to obtain a consolidated estimate of the differences between symbols in the received frame; and demodulating (305) the information words received from the consolidated estimate obtained. The invention also relates to a corresponding modulation method and to devices and programs for implementing the methods.