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US 8,711,907 B2Granted
PMI feedback with codebook interpolation
AssigneeIntel Corporation
InventorsYuan Zhu, Xiaogang Chen, Qinghua Li
Life of this patent
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Abstract
Various embodiments of this disclosure may describe apparatuses, methods, and systems for interpolation of precoding matrixes to increase feedback accuracy of the channel state information (CSI) feedback in a wireless communication network. Other embodiments may also be disclosed or claimed.
Claims18
A method comprising:
- receiving, by a fixed station from a user equipment via a wireless communication, channel state information associated with a wireless communication channel, the channel state information including a first precoding matrix indicator (PMI) related to a first precoding matrix associated with one or more frequency resources of the wireless communication channel, and a second PMI related to a second precoding matrix associated with the one or more frequency resources of the wireless communication channel;
- producing, by the fixed node, an interpolated precoding matrix based on an average of the first precoding matrix and the second precoding matrix;
- and
- transmitting, by the fixed node, a signal via the wireless communication channel based on the interpolated precoding matrix;
- wherein the first PMI includes a wideband PMI associated with the wireless communication channel.
2 more elements
A method, comprising:
- identifying, by a user equipment, from a codebook preconfigured at the user equipment, a first precoding matrix associated with a wireless communication channel;
- interpolating, by the user equipment, the first precoding matrix with one or more second precoding matrices from the codebook to produce one or more interpolated precoding matrices, wherein an interpolated precoding matrix in the one or more interpolated precoding matrices is a linear average of the first precoding matrix and one of the one or more second precoding matrices;
- transmitting, by the user equipment, via a channel state information feedback message, a first precoding matrix indicator (PMI) related to the first precoding matrix and a second PMI related to a second precoding matrix, selected from the one or more second precoding matrices, to the fixed node, wherein the first precoding matrix is a first wideband precoding matrix associated with the wireless communication channel, the second precoding matrix is a subband precoding matrix associated with a subband of the wireless communication channel, and the or more interpolated precoding matrix is associated with the subband.
An apparatus, comprising:
- a receiver configured to receive channel state information associated with a wireless communication channel between a user equipment and the apparatus, the channel state information including information related to a first precoding matrix and information related to a second precoding matrix associated with one or more frequency resources of the wireless communication channel;
- an interpolator operatively coupled to the receiver and configured to produce an interpolated precoding matrix based on an average of the first precoding matrix and the second precoding matrix;
- and
- a transmitter operatively coupled to the interpolator to transmit a signal via the wireless communication channel based on the interpolated precoding matrix;
- wherein the information related to the first precoding matrix includes a wideband PMI associated with the wireless communication channel.
2 more elements
A system, comprising:
- one or more multiple-input-multiple-output (MIMO) antennas;
- a codebook including a plurality of precoding matrices;
- a interpolator coupled to the codebook configured to interpolate a first precoding matrix associated with a wireless communication channel between the system and a fixed node with one or more second precoding matrices to produce one or more interpolated precoding matrices, wherein the first precoding matrix and the one or more second precoding matrices are from the codebook, and wherein an interpolated precoding matrix in the interpolated precoding matrices is based at least in part on an average of the first precoding matrix and one of the one or more second precoding matrices;
- and a transmitter operatively coupled to the interpolator to transmit, via the one or more MIMO antennas, in a channel state information (CSI) feedback message, a first precoding matrix indicator (PMI) related to the first precoding matrix and a second PMI related to at least one of the one or more interpolated precoding matrices to the fixed node, wherein the first PMI includes a first wideband PMI associated with the wireless communication channel, and the second PMI includes a second wideband PMI associated with the wireless communication channel, wherein the at least one of the one or more interpolated precoding matrices is interpolated based on the first precoding matrix and a second precoding matrix indicated by the second wideband PMI.
1 more element
Dependencies are inferred from the claim text.