IMU-assisted polarization division multiplexed MIMO wireless communication

A wireless terminal, comprising:

• at least one sensor;
• an antenna array having antenna elements being associated with respective ones of two mutually orthogonal polarization planes;
• and
• a processor being arranged for
• receiving a multiple input multiple output, MIMO, transmission from an access node of the wireless communication network;
• estimating a spatial orientation of the antenna array of the wireless terminal based on measurements performed by the at least one sensor of the wireless terminal;
• and
• based on the estimated spatial orientation, filtering out a polarization crosstalk from the received MIMO transmission,
• the polarization crosstalk being associated with the spatial orientation of the antenna array of the wireless terminal.

A method of controlling radio transmissions in a wireless communication network, the method comprising in an access node of the wireless communication network:

• controlling a first multiple input multiple output, MIMO, transmission between the access node and a first wireless terminal
• to use a first set of time-frequency resources,
• to use a first MIMO spatial channel, and
• to use a first transmit polarization state;
• controlling a second MIMO transmission between the access node and a second wireless terminal
• to use a second set of time-frequency resources which at least partially overlaps the first set of time-frequency resources,
• to use a second MIMO spatial channel which at least partially overlaps the first MIMO spatial channel, and
• to use a second transmit polarization state which differs from the first transmit polarization state;
• the controlling of the MIMO transmissions comprising precoding the MIMO transmissions to allow for a filtering of mutual polarization crosstalk of the MIMO transmissions,
• the respective polarization crosstalk being associated with a spatial orientation of an antenna array of the respective wireless terminal.