Patent ID: 9608704
Date: 2017-03-28
CPC Classifications: H04B,H04L,H04W

Claim:
1. An apparatus for providing channel dependent codebook based precoding feedback from a first device in a multiple-input, multiple-output (MIMO) communication system, comprising: a precoding device configured for selecting by a first device a precoding matrix from a precoding codebook, where the precoding codebook comprises: a transmitting device configured for sending information comprising feedback information indicative of the selected precoding matrix over a channel to a second device, wherein the feedback information comprises an index and a single feedback bit to be used to switch between spatial multiplexing and beamforming, wherein the spatial multiplexing corresponds to a first power allocation across column vectors of a first multi-stream transmission codematrix, and the beamforming corresponds to full power allocation on a predefined column vector of a second multi-stream transmission codematrix, wherein the index and the single feedback bit specify one or more columns of a selected multi-stream transmission codematrix in the set of multi-stream transmission codematrices.