A calibration system, in a transmitter chip, selects a first transmit path for a first transmit signal and a second transmit path for a second transmit signal. The plurality of transmit paths are associated with a plurality of antenna elements. A first signal parameter of the second transmit signal is adjusted relative to the first signal parameter of the first transmit signal to maximize a first signal strength value of an added signal or minimize a second signal strength value of a subtracted signal. An offset of the first signal parameter is calibrated based on the adjusted first signal parameter in the second transmit path. A value of a second signal parameter is calibrated 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.

A calibration system, in a transmitter chip, selects a first transmit path for a first transmit signal and a second transmit path for a second transmit signal. The plurality of transmit paths are associated with a plurality of antenna elements. A first signal parameter of the second transmit signal is adjusted relative to the first signal parameter of the first transmit signal to maximize a first signal strength value of an added signal or minimize a second signal strength value of a subtracted signal. An offset of the first signal parameter is calibrated based on the adjusted first signal parameter in the second transmit path. A value of a second signal parameter is calibrated 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.

The present disclosure may provide technique(s) to configure a UE for asynchronous UL HARQ transmission. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may perform an initial RRC configuration procedure. The apparatus may transmit a first RRC message. The first RRC message may indicate that the UE supports a VoLTE mode. The apparatus may receive a second RRC message from the base station. The second RRC message may configure the UE to operate in VoLTE mode. The apparatus may monitor a CSS for a first uplink grant in first DCI. The first uplink grant may not contain an uplink HARQ ID field. The apparatus may monitor a USS for a second uplink grant in second DCI. The second uplink grant may be associated with asynchronous uplink HARQ, and the second uplink grant may include a HARQ ID field.

The present disclosure may provide technique(s) to configure a UE for asynchronous UL HARQ transmission. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may perform an initial RRC configuration procedure. The apparatus may transmit a first RRC message. The first RRC message may indicate that the UE supports a VoLTE mode. The apparatus may receive a second RRC message from the base station. The second RRC message may configure the UE to operate in VoLTE mode. The apparatus may monitor a CSS for a first uplink grant in first DCI. The first uplink grant may not contain an uplink HARQ ID field. The apparatus may monitor a USS for a second uplink grant in second DCI. The second uplink grant may be associated with asynchronous uplink HARQ, and the second uplink grant may include a HARQ ID field.

Apparatus and methods for beamforming communication systems with sensor aided beam management are provided. In certain embodiments, a beamforming communication system includes an antenna array including a plurality of antenna elements. The beamforming communication system further includes a plurality of signal conditioning circuits operatively associated with the antenna elements, one or more sensors that generate sensor data, and a beam management circuit that controls the signal conditioning circuits to manage beamforming. The beam management circuit provides beam management based on the sensor data.

A method and apparatus for performing uplink (UL) transmit diversity implemented in a wireless transmit/receive unit (WTRU) includes receiving a signal including precoding information. The precoding information is detected and applied to an UL transmission. The UL transmission is transmitted with the applied precoding information.

A signal quality associated with radio transmissions from a first device (100) to a second device (10) is determined. Further, an uncertainty of the determined signal quality is determined. Depending on the determined signal quality and uncertainty, a beamforming configuration, applied by the first device (100) for performing the radio transmissions to the second device (10), is adapted.

A mobile station transmits to a base station a plurality of pre-coding indicators using respective feedback schemes of a plurality of kinds of feedback schemes that can be set simultaneously by the base station. The mobile station receives from the base station a downlink signal on which pre-coders corresponding to one of the transmitted pre-coding indicators have been applied, and a pre-coder confirmation representing whether the corresponding pre-coders have been applied. The pre-coders represented by the pre-coder confirmation are associated with one of the plural feedback schemes.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a signal. The UE may determine, based at least in part on a machine learning component, a predicted communication metric and a confidence indication, the machine learning component comprising a machine learning model, and wherein determining the predicted communication metric and the confidence indication comprises: receiving, by the machine learning model, an input that comprises an input metric and an error measurement corresponding to the input metric; and providing, by the machine learning model, and based at least in part on a machine learning function and the input, the predicted communication metric and the confidence indication. The UE may perform a wireless communication task based at least in part on the predicted communication metric and the confidence indication. Numerous other aspects are described.

A transmission method for communication by a transmission apparatus of a wireless communication system performing wireless communication in a beamforming scheme is disclosed. The method may include assigning identifiers to all transmission beam directions in which transmission is possible and transmitting a reference signal with a beam identifier assigned in each direction, when identifier information of a beam direction, which allows reception from a reception apparatus, and error detection information are received, examining the error detection information to examine whether an error exists, and transmitting a response signal to the reception apparatus according to whether the examined error exists, and transmitting and receiving data on the basis of the received beam information when the error does not exist, as a result of the examination of the error detection information.