Beamforming prediction device, method and program

A beamforming prediction method comprising:

• calculating, by a trajectory prediction unit, a trajectory of a given mobile terminal using location information about the mobile terminal;
• providing a fingerprint database that stores a plurality of fingerprints, each fingerprint includes the trajectory for a mobile terminal, a received signal strength for the mobile terminal, and a pair of beam arrival angle and beam departure angles for the mobile terminal;
• calculating, by a fingerprint estimation unit, a sparse coefficient corresponding to the trajectory of the given mobile terminal using sparse coding and a dictionary, where the sparse coefficient represents weights assigned to different trajectories, and the dictionary stores a set of feature vectors extracted from the fingerprint database;
• calculating, by a beamforming calculation unit, beamforming for the given mobile terminal, where beamforming is calculated by optimizing transmission rate of the given mobile terminal using the sparse coefficient and trajectories stored in the fingerprint database.

A non-transitory computer-readable medium having computer-executable instructions that, upon execution of the instructions by a processor of a computer, cause the computer to:

• calculating a trajectory of a given mobile terminal using location information about the mobile terminal;
• storing a plurality of fingerprints in a fingerprint database, each fingerprint includes the trajectory for a mobile terminal, a received signal strength for the mobile terminal, and a pair of beam arrival angle and beam departure angles for the mobile terminal;
• calculating a sparse coefficient corresponding to the trajectory of the given mobile terminal using sparse coding and a dictionary, where the sparse coefficient represents weights assigned to different trajectories, and the dictionary stores a set of feature vectors extracted from the fingerprint database;
• calculating beamforming for the given mobile terminal, where beamforming is calculated by optimizing transmission rate of the given mobile terminal using the sparse coefficient and trajectories stored in the fingerprint database.