Method and precoder information feedback in multi-antenna wireless communication systems
First Claim
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1. A wireless communication device configured for sending precoder matrix information to a base station, the device comprising:
- a transmitter configured for sending the precoder matrix information to the base station, the precoder matrix information comprising;
a first representation of a first matrix chosen from a first codebook and a second representation of a second matrix chosen from a second codebook, the first matrix having at least two column vectors, the first representation and the second representation together conveying a precoder matrix of one or more vectors associated with one or more spatial layers; and
the precoder matrix comprising a first sub-precoder matrix including a first set of weights on a first subset of transmit antennas of the base station and a second sub-precoder matrix including a second set of weights on a second subset of transmit antennas of the base station, the first and the second subsets of transmit antennas of the base station being non-overlapping, the first sub-precoder matrix and the second sub-precoder matrix comprising one or more column vectors of the first matrix corresponding to the first representation multiplied by one or more entries of the second matrix corresponding to the second representation.
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Abstract
A method for two component feedback in wireless communication systems is disclosed, with a wireless communication device sending a first representation of a first matrix chosen from a first codebook, wherein the first matrix has at least two columns, the wireless communication device sending a second representation of a second matrix chosen from a second codebook, and the base station obtaining a precoder from the first representation and the second representation.
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Citations
31 Claims
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1. A wireless communication device configured for sending precoder matrix information to a base station, the device comprising:
a transmitter configured for sending the precoder matrix information to the base station, the precoder matrix information comprising; a first representation of a first matrix chosen from a first codebook and a second representation of a second matrix chosen from a second codebook, the first matrix having at least two column vectors, the first representation and the second representation together conveying a precoder matrix of one or more vectors associated with one or more spatial layers; and the precoder matrix comprising a first sub-precoder matrix including a first set of weights on a first subset of transmit antennas of the base station and a second sub-precoder matrix including a second set of weights on a second subset of transmit antennas of the base station, the first and the second subsets of transmit antennas of the base station being non-overlapping, the first sub-precoder matrix and the second sub-precoder matrix comprising one or more column vectors of the first matrix corresponding to the first representation multiplied by one or more entries of the second matrix corresponding to the second representation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of precoding at a base station based on feedback from a wireless communication device, the method comprising:
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receiving feedback conveying a recommended precoder from the wireless communication device, the feedback comprising a first representation of a first matrix chosen from a first codebook and a second representation of a second matrix chosen from a second codebook, the first matrix having at least two column vectors, the first representation and the second representation together conveying a precoder matrix of one or more vectors associated with one or more spatial layers; constructing a final precoder as a function of the received feedback; precoding at least one data stream using the final precoder; and transmitting the at least one data stream from the base station to the mobile communication device. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification