Beam training performed by a terminal device

A terminal device for beam training, the terminal device comprising processing circuitry, the processing circuitry being configured to cause the terminal device to perform a process that includes:

• the terminal device using a first receive beam (RXB1) to receive a first beam reference signal transmitted by a base station using a first transmit (TX) beam;
• the terminal device obtaining a first measurement value related to a measurement of the received first beam reference signal;
• the terminal device using the RXB1 to receive a second beam reference signal transmitted by the base station using a second TX beam;
• the terminal device obtaining a second measurement value related to a measurement of the received second beam reference signal;
• the terminal device using the first and second measurement values to calculate a compensation value;
• the terminal device using a second receive beam (RXB2) to receive a third beam reference signal transmitted by the base station using the first TX beam;
• the terminal device obtaining a third measurement value related to a measurement of the received third beam reference signal;
• the terminal device using a third receive beam (RXB3) to receive a fourth beam reference signal transmitted by the base station using the second TX beam;
• the terminal device obtaining a fourth measurement value related to a measurement of the received fourth beam reference signal;
• the terminal device adjusting the third measurement value using the calculated compensation value, thereby obtaining a compensated third measurement value;
• and
• the terminal device using the compensated third measurement value and the fourth measurement value to select an RX beam from a set of RX beams comprising the second RX beam and the third RX beam.

A computer program product comprising a non-transitory computer readable medium storing a computer program for beam training, the computer program comprising computer code which, when run on processing circuitry of a terminal device, causes the terminal device to perform a process that includes:

• the terminal device using a first receive beam (RXB1) to receive a first beam reference signal transmitted by a base station using a first transmit (TX) beam;
• the terminal device obtaining a first measurement value related to a measurement of the received first beam reference signal;
• the terminal device using the RXB1 to receive a second beam reference signal transmitted by the base station using a second TX beam;
• the terminal device obtaining a second measurement value related to a measurement of the received second beam reference signal;
• the terminal device using the first and second measurement values to calculate a compensation value;
• the terminal device using a second receive beam (RXB2) to receive a third beam reference signal transmitted by the base station using the first TX beam;
• the terminal device obtaining a third measurement value related to a measurement of the received third beam reference signal;
• the terminal device using a third receive beam (RXB3) to receive a fourth beam reference signal transmitted by the base station using the second TX beam;
• the terminal device obtaining a fourth measurement value related to a measurement of the received fourth beam reference signal;
• the terminal device adjusting the third measurement value using the calculated compensation value, thereby obtaining a compensated third measurement value;
• and
• the terminal device using the compensated third measurement value and the fourth measurement value to select an RX beam from a set of RX beams comprising the second RX beam and the third RX beam.