Precoder Selection For Precoder Cycling
First Claim
1. An apparatus, comprising:
- at least one processor; and
at least one memory storing a computer program;
in which the at least one memory with the computer program is configured with the at least one processor to cause the apparatus to at least;
select a subset of N codewords from a set of X precoding matrix codewords, each selected codeword optimized for both a cross-polarized antenna array and a co-polarized linear antenna array; and
associate each nth one of the N codewords with a respective nth group of physical resource blocks;
in which N is an integer greater than one, X is an integer greater than N, n indexes through N, and each nth group of physical resource blocks comprises at least one physical resource block.
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Abstract
From a set of X precoding matrix codewords, there is selecting a subset of N codewords so that each selected codeword is optimized for both a cross-polarized antenna array and a co-polarized linear antenna array. Each nth one of the N codewords is associated with a respective nth group of physical resource blocks PRBs which are wirelessly transmitted downlink. N and X are integers, X>N, n indexes through N, and each nth group of PRBs comprises at least one PRB. In various embodiments: each selected codeword is characterized in steering energy in a respective direction are associated with the PRB groups such that no pair of the codewords associated with adjacent ones of the PRB groups steers energy in a same direction; and each of the selected N codewords is formed as a product of two matrices and the selected codewords are cycled among the groups of PRBs.
43 Citations
20 Claims
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1. An apparatus, comprising:
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at least one processor; and at least one memory storing a computer program; in which the at least one memory with the computer program is configured with the at least one processor to cause the apparatus to at least; select a subset of N codewords from a set of X precoding matrix codewords, each selected codeword optimized for both a cross-polarized antenna array and a co-polarized linear antenna array; and associate each nth one of the N codewords with a respective nth group of physical resource blocks; in which N is an integer greater than one, X is an integer greater than N, n indexes through N, and each nth group of physical resource blocks comprises at least one physical resource block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
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selecting a subset of N codewords from a set of X precoding matrix codewords, each selected codeword optimized for both a cross-polarized antenna array and a co-polarized linear antenna array; and associating each nth one of the N codewords with a respective nth group of physical resource blocks; in which N is an integer greater than one, X is an integer greater than N, n indexes through N, and each nth group of physical resource blocks comprises at least one physical resource block. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer readable memory storing a computer program comprising:
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code for selecting a subset of N codewords from a set of X precoding matrix codewords, each selected codeword optimized for both a cross-polarized antenna array and a co-polarized linear antenna array; and code for associating each nth one of the N codewords with a respective nth group of physical resource blocks; in which N is an integer greater than one, X is an integer greater than N, n indexes through N, and each nth group of physical resource blocks comprises at least one physical resource block. - View Dependent Claims (18, 19, 20)
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Specification