Transmission modes and signaling for uplink mimo support or single tb dual-layer transmission in lte uplink
AssigneeTexas Instruments Incorporated
InventorsEko N. Onggosanusi, Runhua Chen
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Abstract
An apparatus for mapping data in a wireless communication system. The apparatus includes circuitry for generating a precoding matrix for multi-antenna transmission based on a precoding matrix indicator (PMI) feedback from at least one remote receiver where the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first code book and a second codebook. The apparatus further includes circuitry for precoding one or more layers of a data stream with the precoding matrix and transmitting the precoded layers of data stream to the remove receiver.
Claims16
A method of transmitting data in a wireless communication system, comprising the steps of:
- forming one or more layers of data stream wherein each of the data streams consists of modulated symbols;
- generating an 8-by-N precoding matrix based on a precoding matrix indicator (PMI) feedback from at least one remote receiver wherein the PMI indicates a choice of precoding matrix W derived from a matrix multiplication of two matrices W1 and W2 from a first codebook C1 and a second codebook C2, respectively;
- precoding the one or more layers of data stream via multiplication with the 8-by-N precoding matrix where N is the number of said layers;
- and
- transmitting the precoded layers of data stream to the remote receiver.
A method of receiving data in a wireless communication system, comprising the steps of:
- generating a precoding matrix indicator (PMI) feedback wherein the PMI indicates a choice of precoding matrix W derived from a matrix multiplication of two matrices W1 and W2 from a first codebook C1 and a second codebook C2, respectively;
- and
- transmitting the PMI feedback to a remote transmitter.
Dependencies are inferred from the claim text.