Patent ID: 11924007
Assignee: NOKIA TECHNOLOGIES OY
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 7:
8. An apparatus, comprising:
at least one processor; and
at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus at least to perform:
initializing trainable parameters for at least one model modeling at least one of a delay spread estimator or a Doppler spread estimator and outputting spread estimations;
sampling a batch of examples from a dataset comprising data representing data received, corresponding delay spread or corresponding Doppler spread, wherein sampled data in the batch of examples forms a batch of training data and the corresponding spreads form a batch of validation data;
inputting the batch of the training data to the at least one model;
updating the trainable parameters by applying a stochastic gradient descent on a loss function, which uses spread estimations outputted by the at least one model and spreads in the batch of validation data;
training the at least one model by repeating the sampling, inputting and updating until stop criteria are fulfilled; and
storing, when the stop criteria have been fulfilled, the at least one model for spread estimations or for Doppler spread estimations to be used in apparatuses receiving data over wireless channels.