Patent ID: 8547901

Claim:
An apparatus, comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to perform at least the following: receiving, at a first node, a multiple-input multiple output signal vector, the signal vector comprising a plurality of streams from a second node; estimating, at the first node, a channel matrix representative of a channel between the second node and the first node, the channel matrix comprising a plurality of columns, wherein each of the plurality of columns represents one of the plurality of streams; selecting, at the first node, based on a signal-to-noise ratio of each of the plurality of columns, a predetermined quantity of the plurality of columns, wherein for each selected column, a feedback bit is set to a first value to cause detection at a third node of the one of the plurality of streams sent from the second node; and transmitting the feedback bits to the third node.