Coherence bandwidth signaling for frequency domain imbalance correction

A network entity, comprising:

• one or more memories storing processor-executable code;
• and
• one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to:
• receive a capability message indicating a capability of a user equipment (UE) to estimate a frequency domain imbalance between an in-phase portion of a transmission chain of the network entity and a quadrature-phase portion of the transmission chain of the network entity;
• and
• transmit, based at least in part on the capability message, an indication of a coherence bandwidth associated with the frequency domain imbalance, wherein the coherence bandwidth indicates a quantity of subcarriers over which a change in amplitude of the frequency domain imbalance is below a threshold.

A method for wireless communication by a user equipment (UE), comprising:

• transmitting a capability message indicating a capability of the UE to estimate a frequency domain imbalance between an in-phase portion of a transmission chain of a network entity and a quadrature-phase portion of the transmission chain of the network entity;
• receiving, based at least in part on the capability message, an indication of a coherence bandwidth associated with the frequency domain imbalance, wherein the coherence bandwidth indicates a quantity of subcarriers over which a change in amplitude of the frequency domain imbalance is below a threshold;
• and
• performing an estimation of the frequency domain imbalance based at least in part on the coherence bandwidth.