Wireless communications device and methods for beam training in a wireless communications network

A wireless communications device for beam training with a radio access network of a wireless communications system, wherein the wireless communications device is configured with a first set of multiple beams for a first beam training and a second set of multiple beams for a second beam training and wherein the second set is different from the first set, wherein the wireless communications device comprises a processing module, which is further configured to:

• perform the first beam training with the first set of multiple beams;
• calculate a channel metric associated with the wireless communications device based on the performed beam training with the first set;
• select, for the second beam training, a subset of beams of the second set based on the calculated channel metric and a learned function relating the channel metric to the subset of beams of the second set;
• and perform the second beam training with the selected subset the wireless communications device is further configured to, during a learning phase, to:
• perform multiple first beam trainings with a first learning set of multiple beams;
• perform multiple second beam trainings with a second learning set of multiple beams;
• each beam training with the second learning set corresponding to a respective beam training with the first learning set;
• and compute the learned function based on a supervised learning algorithm and based on a training data set comprising multiple instances of:
• a channel metric associated with the wireless communications device and based on the respective first beam training with the first learning set in the learning phase and a corresponding indication of beam quality of a respective beam out of one or more beams of the second learning set based on the respective second beam training in the learning phase with the second learning set.