Methods for automatic gain control

An apparatus for wireless communications at a first user equipment (UE), comprising:

• one or more processors;
• one or more memories coupled with the one or more processors;
• and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to:
• perform a channel access procedure within frequency resources positioned relative to a first sidelink frequency band to monitor for sidelink control information, a sidelink reference signal, or both, to determine whether full slot transmission by a second UE is scheduled to occur within a first slot, the frequency resources occurring within a threshold frequency offset of the first sidelink frequency band;
• transmit a sidelink grant indicating that one or more messages are scheduled for transmission via the first sidelink frequency band in a subslot of the first slot;
• and
• transmit, in the subslot, the one or more messages via the first sidelink frequency band based at least in part on the channel access procedure indicating that the frequency resources are available during the first slot.

A method for wireless communications at a first user equipment (UE), comprising:

• identifying an automatic gain control parameter that indicates to perform multiple automatic gain control procedures during a slot of a sidelink channel, or the automatic gain control parameter indicates to perform the multiple automatic gain control procedures during the slot based at least in part on an energy detection result for a defined symbol period of the slot, the defined symbol period occurring after a beginning symbol period of the slot;
• performing, based at least in part on the identifying, a first automatic gain control procedure of the multiple automatic gain control procedures on the beginning symbol period of the slot to determine a first gain state for receiving a sidelink grant via a sidelink control channel of the slot;
• receiving, via the sidelink control channel in accordance with the first gain state, the sidelink grant indicating that a sidelink transmission is scheduled for the first UE in a sidelink shared data channel of the slot;
• and
• receiving, using the first gain state and a second gain state determined in accordance with the automatic gain control parameter, the sidelink transmission via the sidelink shared data channel of the slot.