Radio communication receiver cancelling out the cross polarisation of a received signal

A radio communications receiver receiving a radio signal comprising a main polarisation and a secondary polarisation orthogonal to the main polarisation, the receiver comprising:

• a receiving unit for receiving the main polarisation and for receiving the secondary polarisation of the received signal, synchronized as carrier frequency on the main polarisation;
• a cancellation unit for canceling the secondary polarisation synchronized on the main polarisation (and configured to cancel, from the received signal, interference due to the secondary polarisation, the cancellation unit comprising a filtering unit receiving at input the main polarisation and the secondary polarisation to:
• filter the components in phase of the secondary polarisation contributing to interference of the main polarisation, for its components in phase and in quadrature;
• filter the components in quadrature of the secondary polarisation contributing to interference of the main polarisation, for its components in phase and quadrature;
• and
• add the components filtered in this way to the components in phase and in quadrature of the main polarisation such that the filtered signal coming from the filtering unit deletes the contribution of the secondary polarisation on the main polarisation, the filtered signal coming from the filtering unit comprising only the contribution of the main polarisation;
• and
• a demodulation unit for demodulation of the filtered signal, located downstream of the cancellation unit and configured to:
• calculate a carrier frequency error information;
• calculate offset information of the rhythm symbol;
• and
• communicate, by retroaction to the upstream receiving unit, said calculated carrier frequency error information and said offset information of the rhythm symbol, to synchronize in frequency and rhythm said receiving unit so that the main polarisation and the secondary polarisation are synchronized in frequency and rhythm.