Beamforming using base and differential codebooks

摘要

Embodiments of methods and apparatus for determining and/or quantizing a beamforming matrix are disclosed. In some embodiments, the determining and/or quantizing of the beamforming matrix may include the use of a base codebook and a differential codebook. Additional variants and embodiments are also disclosed.

主权项

1. One or more non-transitory computer-readable media having instructions that, when executed by one or more processors, cause a base station to:
process a feedback transmission from a mobile station to determine first and second codebook indices; and determine a beamforming matrix, based on the first and second codebook indices, to facilitate formation of a beam to transmit data to the mobile station in one or more streams, wherein the first codebook index is associated with a first quantization error, the second codebook index is associated with a second quantization error, and the second quantization error is less than the first quantization error, and wherein the instructions, when executed, further cause the base station to: determine a first beamforming matrix component based on the first codebook index; determine a second beamforming matrix component based on the second codebook index; and determine the beamforming matrix based on the first and second beamforming matrix components.