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公开(公告)号：US20160182133A1
公开(公告)日：2016-06-23
申请号：US15055195
申请日：2016-02-26
发明人： Eko Onggosanusi , RUNHUA CHEN , RALF BENDLIN
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/046 , H04B7/0469 , H04B7/0478 , H04B7/0486 , H04B7/0626 , H04B7/0639
摘要： 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.
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公开(公告)号：US20160013845A1
公开(公告)日：2016-01-14
申请号：US14863156
申请日：2015-09-23
发明人： EKO ONGGOSANUSI , RUNHUA CHEN , RALF BENDLIN
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/046 , H04B7/0469 , H04B7/0478 , H04B7/0486 , H04B7/0626 , H04B7/0639
摘要： 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.
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