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1. WO2017166219 - CHANNEL COVARIANCE FEEDBACK FOR ENHANCED FD-MIMO

Publication Number WO/2017/166219
Publication Date 05.10.2017
International Application No. PCT/CN2016/078179
International Filing Date 31.03.2016
IPC
H04B 7/04 2017.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
CPC
H04B 7/0413
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
0413MIMO systems
H04B 7/0417
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
0413MIMO systems
0417Feedback systems
H04B 7/0626
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
06at the transmitting station
0613using simultaneous transmission
0615of weighted versions of same signal
0619using feedback from receiving side
0621Feedback content
0626Channel coefficients, e.g. channel state information [CSI]
H04B 7/063
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
06at the transmitting station
0613using simultaneous transmission
0615of weighted versions of same signal
0619using feedback from receiving side
0621Feedback content
063Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
H04B 7/0645
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
06at the transmitting station
0613using simultaneous transmission
0615of weighted versions of same signal
0619using feedback from receiving side
0636Feedback format
0645Variable feedback
H04L 5/0048
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
5Arrangements affording multiple use of the transmission path
003Arrangements for allocating sub-channels of the transmission path
0048Allocation of pilot signals, i.e. of signals known to the receiver
Applicants
  • QUALCOMM INCORPORATED [US]/[US]
  • CHEN, Bo [CN]/[CN] (US)
  • WEI, Chao [CN]/[CN] (US)
  • WU, Liangming [CN]/[CN] (US)
  • WANG, Neng [CN]/[CN] (US)
Inventors
  • CHEN, Bo
  • WEI, Chao
  • WU, Liangming
  • WANG, Neng
Agents
  • NTD PATENT & TRADEMARK AGENCY LIMITED
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CHANNEL COVARIANCE FEEDBACK FOR ENHANCED FD-MIMO
(FR) RÉTROACTION DE COVARIANCE DE CANAL POUR FD-MIMO AMÉLIORÉS
Abstract
(EN)
Channel covariance feedback is disclosed for enhanced full-dimension multiple input, multiple output (eFD-MIMO) systems. Channel state information (CSI) reference signal (CSI-RS) feedback operations are implemented using spatial covariance feedback of a covariance estimate. After obtaining a set of orthogonal basis vectors, a user equipment (UE) measures the CSI-RS from a base station and determines the spatial covariance matrix from the signal. The UE may then compress the spatial covariance matrix into a lower-dimension covariance estimate matrix using the orthogonal basis vectors. The lower-dimension matrix along with element-wise quantization allows for feedback of spatial covariance for eFD-MIMO systems without excessive feedback overhead.
(FR)
L'invention concerne une rétroaction de covariance de canal pour des systèmes à dimensions complètes et à entrées multiples-sorties multiples améliorés (eFD-MIMO). Des opérations de rétroaction de signal de référence d'informations d'état de canal (CSI) (CSI-RS) sont mises en œuvre à l'aide d'une rétroaction de covariance spatiale d'une estimation de covariance. Après obtention d'un ensemble de vecteurs de base orthogonaux, un équipement d'utilisateur (UE) mesure le CSI-RS à partir d'une station de base et détermine la matrice de covariance spatiale à partir du signal. L'UE peut ensuite compresser la matrice de covariance spatiale en une matrice d'estimation de covariance de dimension inférieure à l'aide des vecteurs de base orthogonaux. Associé à une quantification à l'échelle de l'élément, la matrice de dimension inférieure permet une rétroaction de covariance spatiale pour des systèmes eFD-MIMO sans surdébit de rétroaction excessif.
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