Slater & Matsil, L.L.P.
Method in a wireless communication system
The present invention relates to a method including signalling by a receive node at least one first transmission rank r to a transmit node, where 1≦r ≦R, wherein R is a maximum available rank for a transmission, and at least one predefined precoding matrix corresponds to the first transmission rank r, determining by the transmit node a second transmission rank r′ for transmitting data from the transmit node to the receive node, where 1≦r′ ≦R, defining at least two subsets of precoding matrices for at least one of the at least one first transmission rank r, selecting one of the at least two subsets of precoding matrices in accordance with a channel quality estimate for a radio channel, and signalling the selected one subset of precoding matrices, wherein the selected one subset of precoding matrices is associated with said the at least one predefined precoding matrix.
Huawei Techonlogies Co., Ltd.
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Jianghua Anahid
Liu Robert Safavi