Qualcomm Incorporated

Amit Moses

Ronen Shaked

Aviv Regev

Yaniv Eistein

Gideon Shlomo Kutz

Apparatus, methods, and computer program products for wireless communication are provided. An example method may include transmitting, to a network node, information associated with a first quantity of effective downlink transmit (Tx) antennas associated with the UE. The example method may further include receiving, from the network node, a transmission indicative of a set of precoding functions for a set of Tx antennas associated with the network node, where each precoding function of the set of precoding functions is associated with a respective group of multiple Tx antennas of the set of Tx antennas associated with the network node, and where a second quantity of precoding functions is smaller than or equal to the first quantity of the effective downlink Tx antennas. The example method may further include receiving, from the network node, a second transmission based on the set of precoding functions.

Network node antenna grouping for power reduction on ue

Apparatus, methods, and computer program products for wireless communication are provided. An example method may include receiving, from a network node, at least one channel state information reference signal (CSI RS). The example method may further include transmitting, to the network node, information indicative of at least one power associated with a post-processing frequency domain residual sideband and a noise per each antenna associated with the UE in a channel state feedback (CSF) report based on the at least one CSI RS. The example method may further include receiving, from the network node, a power allocation configuration based on the information indicative of the at least one power associated with the post-processing frequency domain residual sideband and the noise per each antenna associated with the network node.

Adaptive power allocation for TX antenna based on enhanced CSF report

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive an indication that the UE is to apply a digital-post distortion (DPoD) procedure to a received signal to reduce non-linearities of the received signal. In some examples, the UE may determine one or more autocorrelation values for a power delay profile (PDP) of a channel, receive an indication of a matrix, and identify coefficients (e.g., b-coefficients) for use in the DPoD procedure based on multiplying the autocorrelation values and the matrix. Alternatively, a network entity may determine the autocorrelation values indicate them to the UE for use in identifying the coefficients. In some other cases, the network entity may use the autocorrelation values and the matrix to determine the coefficients and then may indicate the coefficients to the UE. The UE may apply the DPoD procedure to the received signal using the coefficients.

Calculating coefficients in low-complexity digital post-distortion procedures

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may apply a precoding operation to a downlink physical channel. The network node may obtain a plurality of coefficients associated with a non-linearity of the downlink physical channel in accordance with estimating a cross-correlation of a plurality of power delay profiles associated with the precoding operation. The network node may precode a physical downlink shared channel communication in accordance with a result of the precoding operation. The network node may transmit the plurality of coefficients via a physical downlink control channel communication. Numerous other aspects are described.

Coefficient estimation for non-linearity cancellation

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may precode communications with a precoding configured to improve non-linearity (NL). Some aspects more specifically relate to a user equipment (UE) obtaining power amplifier (PA) NL coefficients associated with NL of PAs of a network node. The UE may transmit an indication of the PA NL coefficients to the network node, which may use the indication to select precoding configured to improve reception of communications transmitted with PA NL or to improve decoding of communications transmitted using the precoding.

Precoding for non-linearity correction

Methods, systems, and devices for wireless communications are described. The described techniques may provide for an adaptive digital post-distortion (DPoD) procedure and reporting of modulation and coding scheme (MCS) indices for communications between a user equipment (UE) and a network entity. The UE may select a kernel from a set of kernels indicated by the network entity for a DPoD procedure based on a target error vector magnitude (EVM). Additionally, or alternatively, the UE may determine a limitation for an MCS index for the network entity to use in communications with the UE based on a power limitation of the UE and an EVM associated with the MCS. The network entity and the UE may accordingly communicate using the MCS limitation requested by the UE and the determined DPoD kernel.

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Tel Aviv, Israel

Amit Moses