Reducing Precoder Signaling Overhead for MIMO Communication System

摘要

Where receiver performance at a User Equipment (UE) is similar using a coarse precoder codebook as using a fine resolution precoder codebook, the signaling of a two-component precoder codebook is modified such that a precoder codeword is signaled to the UE in only a portion of the physical resources allocated for precoder codeword signaling to the UE. The remaining portion of the allocated physical resources is used to signal control information to improve the UE's performance.

主权项

1. A base station, comprising:
processor circuitry configured to:
determine if a downlink channel to a user equipment (UE) is constant or substantially constant; andselect a precoder codeword from a coarse resolution precoder codebook when the downlink channel to the UE is constant or substantially constant; and transceiver circuit configured, when the downlink channel to the UE is constant or substantially constant, to:
signal the selected precoder codeword to the UE in a first physical resource allocated for precoder codeword signaling to the UE; andconvey control information to the UE in a second physical resource allocated for precoder codeword signaling to the UE.