Channel feedback to support efficient rank override

摘要

A method can include providing channel feedback to support efficient rank override For example, in such a method, a rank−r precoder index corresponding to a rank−r precoder is determined, and performance for each rank−1 precoder within the rank−r precoder is measured Based on the measured performance, a rank−1 precoder that maximizes performance is selected.

主权项

1. A method, comprising:
determining a rank−r precoder that optimizes performance and reporting an associated rank−r precoder index to a network node; determining a rank−1 precoder that optimizes performance and reporting an associated rank−1 precoder index to the network node; wherein the rank−r precoder is determined by a search restricted to a precoder group defined by the rank−1 precoder index; and the rank−r precoder index is signaled with less than ceil(log 2(rank−r codebook size)) bits.