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4TX codebook enhancement in LTE

US9425871B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9425871-B2
Application numberUS-201615055195-A
CountryUS
Kind codeB2
Filing dateFeb 26, 2016
Priority dateFeb 12, 2013
Publication dateAug 23, 2016
Grant dateAug 23, 2016

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  1. Title

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  2. Abstract

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  5. First independent claim

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Abstract

Official abstract text for this publication.

Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook comprises at least a first precoding matrix constructed with a first group of adjacent Discrete-Fourier-Transform (DFT) vectors. In another embodiment, the first codebook comprises at least a second precoding matrix constructed with a second group of uniformly distributed non-adjacent DFT vectors. In yet another embodiment, the first codebook comprises at least a first precoding matrix and a second precoding matrix, where said first precoding matrix is constructed with a first group of adjacent DFT vectors, and said second precoding matrix is constructed with a second group of uniformly distributed non-adjacent DFT vectors.

First claim

Opening claim text (preview).

The invention claimed is: 1. A method of channel state information (CSI) feedback in a wireless communication system, comprising: receiving one or more precoding matrix indicator (PMI) signals from a remote transceiver; and generating a precoding matrix W derived from a matrix multiplication of two matrices W 1 and W 2 , where said precoding matrix W is applicable to precoding one or more layers of data streams, matrix W 1 selected from a first codebook C 1 based on a first g…

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What does patent US9425871B2 cover?
Channel state information (CSI) feedback in a wireless communication system is disclosed. A precoding matrix is generated for multi-antenna transmission based on precoding matrix indicator (PMI) feedback, wherein the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first codebook and a second codebook. In one embodiment, the first codebook c…
Who is the assignee on this patent?
Texas Instruments Inc
What technology area does this patent fall under?
Primary CPC classification H04B7/0417. Mapped technology areas include Electricity.
When was this patent published?
Publication date Tue Aug 23 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).