A method of operation of a self-calibration subsystem of an analog beamforming transceiver to perform self-calibration of antenna elements comprised in the analog beamforming transceiver, comprising: • for each of a plurality of receive antenna elements of a first polarization: ∘ for each of a plurality of transmit beam directions for a second polarization for the analog beamforming transceiver: ▪ transmitting (100, 218) a signal in the transmit beam direction via a plurality of transmit antenna elements of the second polarization; and ▪ obtaining (100, 220) a measurement value for a received signal received via the receive antenna element of the first polarization responsive to the signal transmitted in the transmit beam direction via the plurality of transmit antenna elements of the second polarization; • computing calibration values for the plurality of receive antenna elements of the first polarization and calibration values for the plurality of transmit antenna elements of the second polarization based on the measurement values obtained for each of the plurality of receive antenna elements of the first polarization for each of the plurality of transmit beam directions for the second polarization, known beamforming weights for each of the plurality of receive antenna elements of the first polarization and the plurality of transmit antenna elements of the second polarization, and known coupling factors between the plurality of receive antenna elements of the first polarization and the plurality of transmit antenna elements of the second polarization; and • applying the calibration values for the plurality of receive antenna elements of the first polarization and the calibration values for the plurality of transmit antenna elements of the second polarization. • for each of a plurality of receive antenna elements of a first polarization: ∘ for each of a plurality of transmit beam directions for a second polarization for the analog beamforming transceiver: ▪ transmitting (100, 218) a signal in the transmit beam direction via a plurality of transmit antenna elements of the second polarization; and ▪ obtaining (100, 220) a measurement value for a received signal received via the receive antenna element of the first polarization responsive to the signal transmitted in the transmit beam direction via the plurality of transmit antenna elements of the second polarization; ▪ transmitting (100, 218) a signal in the transmit beam direction via a plurality of transmit antenna elements of the second polarization; and ▪ obtaining (100, 220) a measurement value for a received signal received via the receive antenna element of the first polarization responsive to the signal transmitted in the transmit beam direction via the plurality of transmit antenna elements of the second polarization; • computing calibration values for the plurality of receive antenna elements of the first polarization and calibration values for the plurality of transmit antenna elements of the second polarization based on the measurement values obtained for each of the plurality of receive antenna elements of the first polarization for each of the plurality of transmit beam directions for the second polarization, known beamforming weights for each of the plurality of receive antenna elements of the first polarization and the plurality of transmit antenna elements of the second polarization, and known coupling factors between the plurality of receive antenna elements of the first polarization and the plurality of transmit antenna elements of the second polarization; and • applying the calibration values for the plurality of receive antenna elements of the first polarization and the calibration values for the plurality of transmit antenna elements of the second polarization.