Frequency drift compensation in a distributed multiple-input-multiple-output network

Method of estimation and correction, at the level of a base station, of a frequency drift between signals transmitted by a plurality of antenna systems spatially distributed around a computing unit of the base station and signals received by a radio device, the method comprising:

• a) the sending, by the radio device, of a first signal, said signal being received by each of the antenna systems;
• b) the conversion, by the antenna systems, of said first received signal into second baseband signals, and their transmission, by the antenna systems, to the computing unit;
• c) the measurement, by the computing unit, of angles of arrival of the second signals and of the frequency drift of the second baseband signals;
• d) the estimation, by the computing unit, of a displacement angle of the radio device, of a first frequency offset induced by the displacement of the radio device, and of a second frequency offset between a clock of the radio device and synchronized clocks of the antenna systems;
• e) the frequency adjustment and the pre-coding, by the computing unit and for each of the antenna systems, of third baseband signals;
• and
• f) the transmission, by the computing unit, of the third baseband signals to the plurality of antenna systems and the transmission, by said plurality of antenna systems, of said third baseband signals to the radio device.