Method and system for precoding data
AssigneeHuawei Technologies Co., Ltd.
InventorsDavid MAZZARESE, Yongxing ZHOU
Life of this patent
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Abstract
The present disclosure relates to channel state feedback in a communication system. The method includes obtaining a reference signal from an access point; deriving a rank indication, a codebook subset selection indication and a precoding matrix index based on the obtained reference signal; sending a first feedback message conveying the rank indication and the codebook subset selection indication, and sending a second feedback message conveying the precoding matrix index, to the access point; and receiving, from the access point, data precoded by a matrix derived based on the rank indication, the codebook subset selection indication and the precoding matrix index.
Claims11
A machine-readable storage medium having stored thereon, a computer program comprising at least one code section for distributing data, the at least one code section being executable by a machine for causing the machine to perform the following:
- receiving at least one reference signal from a transmitting device;
- deriving a rank indication, a codebook index n1 in a first codebook C1, and codebook indices k1 and k2 in a second codebook C2 based on the at least one reference signal;
- sending the rank indication, the codebook index n1 in the first codebook C1, and the codebook indices k1 and k2 in the second codebook C2 to the transmitting device;
- and
- receiving data precoded by a first precoder from the transmitting device;
- wherein the first precoder comprises a second precoder and a third precoder, the second precoder is determined based on the indices n1 and k1, and the third precoder is determined based on the indices n1 and k2.
A machine-readable storage medium having stored thereon, a computer program comprising at least one code section for distributing data, the at least one code section being executable by a machine for causing the machine to perform the following:
- receiving a rank indication, a codebook index n1 in a first codebook C1, and codebook indices k1 and k2 in a second codebook C2 from a receiving device;
- determining a first precoder based on the rank indication, the indices n1, k1 and k2;
- precoding data to be sent to the receiving device by the first precoder;
- and
- sending the precoded data to the receiving device;
- wherein the first precoder comprises a second precoder and a third precoder, the second precoder is determined based on the indices n1 and k1, and the third precoder is determined based on the indices n1 and k2.
Dependencies are inferred from the claim text.