Channel estimation with precoding matrix smoothing at the transmitter

摘要

Various communication network may benefit from precoding matrix smoothing. For example, a network node comprises a processor and a memory including computer program code. The memory and the computer program code, with the processor, are configured to cause the network node to receive a precoding matrix index indicating a precoding matrix, allocate resources for downlink transmission to a user equipment, smooth a plurality of precoding matrices including the precoding matrix across the allocated resources and transmit a signal indicating the plurality of precoding matrices have been smoothed. Based on the signal, the user equipment can perform interference reduction or cancellation.

主权项

1. A method comprising:
transmitting a subband precoding matrix index indicating a precoding matrix to a network node; receiving a signal indicating a plurality of precoding matrices including the subband precoding matrix have been smoothed across allocated resources; and performing channel estimation across the allocated resources based on the received signal, wherein the smoothed precoding matrix is based on precoding matrix of each of the allocated resources, and the allocated resources comprise more than one subband.