Meta Platforms, Inc.
Calibration of an antenna array that uses low-resolution phase shifters

Abstract:

Apparatuses, methods, and systems for calibrating of an antenna array that uses low-resolution phase shifters, are disclosed. On method includes generating a codebook of phase-shifter setting selections for each of a plurality of antenna elements of an antenna array including communicating a wireless signal between an external calibration antenna and the antenna array through a beam formed by a reference antenna element of the antenna array and an antenna element of the antenna array being calibrated, measuring a signal power of the communicated wireless signal for each of N settings of a digitally selected phase shifter associated with the antenna element of the antenna array being calibrated, and estimating a virtual signal power of each of M settings of the digitally selected phase shifter based on the signal power measurements of the N settings of the digitally selected phase shifter, wherein M is greater than N.