Antenna System Calibration
AssigneeNokia Solutions and Networks Oy
InventorsJukka KAREISTO, Eero Olavi HEIKKINEN
Life of this patent
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Abstract
A method for antenna calibration is disclosed, the method including driving calibration signals for antenna array beam calibration to an antenna array feeder line in a transceiver front end unit by using one or more directional couplers and/or radio frequency probes, wherein calibration signal paths are integrated inside the transceiver front end unit. Measurements are carried out on the calibration signals, between different antenna combinations inside the antenna array. Based on collected measurement data, calibration information is calculated for each measurement branch of the antenna array by using a mathematical formula. Active antenna array beam calibration is then performed based on the calculated calibration information.
Claims25
A method for antenna calibration in communications, characterized by
- driving calibration signals for antenna array beam calibration to an antenna array feeder line in a transceiver front end unit by using one or more directional couplers and/or radio frequency probes, wherein calibration signal paths are integrated inside the transceiver front end unit;
- carrying out measurements on the calibration signals between different antenna combinations inside the antenna array;
- based on collected measurement data, calculating calibration information for each measurement branch of the antenna array by using a mathematical formula;
- performing active antenna array beam calibration based on the calculated calibration information.
An apparatus comprising an arrangement for coupling a first antenna and a second antenna, a receiver operationally coupled to the first antenna, and a transmitter operationally coupled to the second antenna, characterized by
- the transmitter being configured to
- drive calibration signals for antenna array beam calibration to an antenna array feeder line in a transceiver front end unit by using one or more directional couplers and/or radio frequency probes, wherein calibration signal paths are integrated inside the transceiver front end unit;
- the receiver being configured to
- carry out measurements on the calibration signals between different antenna combinations inside the antenna array;
- based on collected measurement data, calculate calibration information for each measurement branch of the antenna array by using a mathematical formula;
- and
- perform active antenna array beam calibration based on the calculated calibration information.
Dependencies are inferred from the claim text.