Amplitude and phase calibration at a transmitter chip in an antenna array

A calibration system, comprising:

• one or more circuits in a first transmitter chip of a plurality of transmitter chips, wherein the one or more first circuits are configured to:
• receive, at an antenna element, one or more output signals from one or more second transmitter chips of the plurality of transmitter chips,
• wherein each of the one or more output signals comprise a calibrated offset of a first signal parameter and a calibrated value of a second signal parameter determined at a corresponding second transmitter chip;
• add or subtract, at the antenna element, the received one or more output signals;
• calibrate an offset of a first signal parameter based on an adjusted first signal parameter of a second output signal relative to a corresponding first signal parameter of a first output signal,
• wherein the adjustment of the first signal parameter of the second output signal maximizes a first signal strength value of the added signal or minimizes a second signal strength value of the subtracted signal;
• and
• calibrate a value of the second signal parameter based on a matching of the second signal parameter of the second output signal relative to the second signal parameter of the first output signal,
• wherein the second signal parameter is an amplitude of the second transmit signal.

A calibration system in an antenna array, comprising:

• a transmitter chip configured to:
• select, from a plurality of transmit paths within the transmitter chip, a first transmit path for a first transmit signal and a second transmit path for a second transmit signal, wherein the plurality of transmit paths are associated with a plurality of antenna elements of the antenna array;
• adjust a first signal parameter of the second transmit signal relative to a corresponding first signal parameter of the first transmit path to maximize a first signal strength value of an added signal or minimize a second signal strength value of a subtracted signal;
• calibrate an offset of the corresponding first signal parameter based on the adjusted first signal parameter in the second transmit path;
• and
• calibrate a value of a second signal parameter based on a matching of the second signal parameter in the second transmit path relative to the second signal parameter in the first transmit path;
• and
• a receiver chip configured to:
• receive a plurality of output signals, transmitted by the transmitter chip, at a plurality of input interfaces of a plurality of receive paths;
• select a first receive path and a second receive path from the plurality of receive paths in the receiver chip;
• calibrate one or more signal parameters in the first receive path relative to the second receive path based on one of maximized first signal strength value of addition of a first output signal and a second output signal of the plurality of output signals or minimized second signal strength value of subtraction of the first output signal and the second output signal;
• and
• generate a signal based on the calibration.

A non-transitory computer-readable medium having stored thereon, computer executable instruction that when executed by a computer, cause the computer to execute instructions, comprising:

• in a transmitter chip provided in an antenna array, the transmitter chip:
• selecting, from a plurality of transmit paths within the transmitter chip, a first transmit path for a first transmit signal and a second transmit path for a second transmit signal, wherein the plurality of transmit paths are associated with a plurality of antenna elements of the antenna array;
• adjusting a first signal parameter of the second transmit signal relative to a corresponding first signal parameter of the first transmit path to one of maximize a first signal strength value of an added signal or minimize a second signal strength value of a subtracted signal;
• calibrating an offset of the corresponding first signal parameter based on the adjusted first signal parameter in the second transmit path;
• and
• calibrating a value of a second signal parameter of the second transmit signal based on a matching of the second signal parameter in the second transmit path relative to a corresponding second signal parameter in the first transmit path,
• wherein the second signal parameter is an amplitude of the second transmit signal.