Codebook for full-dimension multiple input multiple output communications
AssigneeIntel IP Corporation
InventorsYuan Zhu, Qinghua Li, Xiaogang Chen, Jong-Kae Fwu
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Abstract
Various embodiments include an apparatus to be employed by an enhanced Node B (eNB), the apparatus comprising communication circuitry to receive, from a user equipment (UE), feedback information and control circuitry, coupled with the communication circuitry, to identify a codeword from a three-dimensional codebook based on the feedback information received from the UE, wherein the communication circuitry is further to precode data to be transmitted to the UE based on the codeword. An apparatus to be employed by a UE and additional methods are described.
Claims19
An apparatus to be employed by an enhanced Node B (eNB), the apparatus comprising:
- communication circuitry to receive, from a user equipment (UE), feedback information;
- and
- control circuitry, coupled with the communication module, to identify a codeword from a three-dimensional codebook based on the feedback information received from the UE,
- wherein the communication circuitry is to precode data to be transmitted to the UE based on the codeword and the three-dimensional codebook includes a plurality of codewords, each of which is constructed as a product of a first matrix, a second matrix, and a third matrix, and the control circuitry is to configure a codebook size, a start zenith angle, and a zenith angle step size of the three-dimensional codebook by radio resource control (RRC) signaling.
An apparatus to be employed by a user equipment (UE), the apparatus comprising:
- communication circuitry to receive a channel state information reference signal transmitted from an enhanced Node B (eNB);
- computation circuitry, coupled with the communication circuitry, to measure channel state information based on the channel state information reference signal, and select a codeword from a three-dimensional codebook based on the measured channel state information, wherein the three-dimensional codebook includes a plurality of codewords, each of which is constructed as a product of a first matrix, a second matrix and a third matrix, and the codebook has a codebook dimension that includes 2N*M-number of rows and 1- to 2N-number of columns, where 2N*M is equal to a number of antennas in an antenna array;
- and
- feedback circuitry, coupled to the computation circuitry, to feed back information to indicate the selected codeword to the eNB.
One or more non-transitory computer-readable media having instructions that, when executed, cause an enhanced Node B (eNB) to:
- receive feedback information from a user equipment (UE);
- identify a codeword from a three-dimensional codebook based on the received feedback information;
- precode data to be transmitted to the UE based on the identified codeword;
- and
- transmit the precoded data to the UE,
- wherein the three-dimensional codebook includes a plurality of codewords, each of which is constructed as a product of a first matrix, a second matrix and a third matrix, and the first matrix has a dimension of 2N*M by 2N and has at most M-number of non-zero elements in each column, and the non-zero elements in all columns are in different rows, where 2N*M is equal to a number of antennas in an antenna array.
Dependencies are inferred from the claim text.