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公开(公告)号：US20230318717A1
公开(公告)日：2023-10-05
申请号：US18022609
申请日：2020-08-24
发明人： Shaohua Li , Jianguo Long
CPC分类号： H04B17/12 , H04B7/0626 , H04B17/14 , H04B7/0639
摘要： Embodiments of the present disclosure provide methods and apparatuses for base station antenna calibration. A method is implemented in a base station for a cellular communications system. The method includes configuring a user equipment, UE, for a plurality of channel state information, CSI, reports associated to respective CSI reporting bands, the respective CSI reporting bands being either: (a) different subsets of sub-bands within a downlink bandwidth of the base station or (b) different downlink bandwidth parts served by the base station; receiving the CSI reports from the UE; estimating phase and delay errors for a plurality of transmit antenna branches of the base station; compensating for the estimated phase and delay errors for the transmit antenna branches based on the CSI reports received from the UE; and transmitting a downlink signal while compensating for the estimated phase and delay errors for the transmit antenna branches of the base station.
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公开(公告)号：US10097286B2
公开(公告)日：2018-10-09
申请号：US15112227
申请日：2014-02-19
发明人： Jianguo Long , Girum Fantaye , Bo Göransson
摘要： The disclosure relates to a method, performed in a multi-antenna radio access node comprising four logical antenna ports mapped to corresponding physical antennas, of transmitting data using three physical antennas. The method comprises determining (S51) loss of data transmission from one physical antenna of the four physical antennas. A required multi-antenna transmission scheme is determined (S52). An antenna mapping matrix prestored in the radio access node is selected (S53), the selected antenna mapping matrix adapted to the required multi-antenna transmission scheme. Data on the four logical antenna ports are re-mapped (S54) to the remaining three physical antennas by using the selected antenna mapping matrix, whereupon the data is transmitted (S55) from the remaining three physical antennas.
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3.发明授权公开(公告)号：US11996913B2
公开(公告)日：2024-05-28
申请号：US17286649
申请日：2018-10-18
发明人： Yongquan Qiang , Jianguo Long , Hong Ren
IPC分类号： H04B7/0452 , H04B7/06 , H04L5/00 , H04W24/08
CPC分类号： H04B7/0452 , H04B7/0695 , H04L5/0048 , H04W24/08
摘要： Systems and methods are disclosed herein for multi-user pairing and, in some embodiments, Signal to Interference plus Noise Ratio (SINR) calculation in a cellular communications system. In some embodiments, a method performed in a base station of a cellular communications system to perform downlink scheduling for Multi-User Multiple Input Multiple Output (MU-MIMO) comprises, for each User Equipment (UE) of a plurality of UEs considered for MU-MIMO UE pairing, obtaining a relative beam power at the UE for each of the plurality of beams. The relative beam power at the UE for each beam is a value that represents a relative beam power of the beam at the UE relative to a beam power of a strongest of the plurality of beams at the UE. The method further comprises selecting a MU-MIMO UE pairing based on the obtained relative beam powers.
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4.发明授权公开(公告)号：US11894898B2
公开(公告)日：2024-02-06
申请号：US17770785
申请日：2019-10-23
发明人： Jianguo Long , Shaohua Li
CPC分类号： H04B7/0617 , H04B7/063 , H04B7/10 , H04B17/102
摘要： A method, network node and wireless device for phase error compensation for Fifth Generation downlink systems with four correlated uncalibrated antennas are provided. A method includes applying N incremented phase rotations to one of the four antennas to produce N channel state information reference signal resources, N being an integer greater than 1. The method also includes transmitting N CSI-RS on 4 CSI-RS ports to a wireless device, WD, each of the N CSI-RS resources being transmitted with a different one of the incremented phase rotations. The method further includes receiving from the WD a CSI-RS resource indication that indicates a particular one of the N CSI-RS resources. The method also includes applying, in subsequent transmissions to the WD, a phase rotation to the one of the four antennas, the phase rotation corresponding to the indicated CSI-RS resource.
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公开(公告)号：US11411632B2
公开(公告)日：2022-08-09
申请号：US16976207
申请日：2019-02-28
发明人： Jianguo Long , Mats Åhlander , Chandra Sekhar Bontu , Yongquan Qiang , Hong Ren
IPC分类号： H04B7/06 , H04B17/336 , H04B7/0452
摘要： Systems and methods for estimating Signal-to-Noise Ratio (SNR) for Multi-User Multiple-Input and Multiple-Output (MU-MIMO) based on channel orthogonality. In some embodiments, a method performed by a radio access node includes obtaining a SU-MIMO signal quality measurement for at least a first user and an additional user; obtaining an indication of orthogonality between a channel of the first user and a channel of the additional user; and estimating a MU-MIMO signal quality measurement for the first user as if the first user and the additional user are paired with each other for a potential MU-MIMO transmission based on the SU-MIMO signal quality measurements and the indication of orthogonality. In this way, a computational complexity for the SINR estimation of MU-MIMO users can be greatly reduced. This may enable a large number of user pairing alternatives to be evaluated in practical wireless systems to achieve improved MU-MIMO performance.
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公开(公告)号：US10171146B2
公开(公告)日：2019-01-01
申请号：US15549762
申请日：2015-02-16
发明人： James Jianfeng Weng , Hua Xu , Xixian Chen , Jianguo Long , Guoqiang Lu , Michael Roger , Ying Shao , Michel Chauvin
IPC分类号： H04L1/06 , H04B7/0456 , H04L1/00 , H04L1/18
摘要： Systems and methods for Multiple-Input and Multiple-Output (MIMO) rank reduction to improve downlink throughput are disclosed. A method of operation of a radio access node includes determining that an imbalance between parallel channels of a spatial multiplexing downlink transmission to a wireless device is greater than an imbalance threshold and/or that a Negative Acknowledgement (NACK) rate over time for the parallel channels of a spatial multiplexing downlink transmission reported by the wireless device is greater than a NACK rate threshold. The method also includes, in response to determining that the imbalance between the parallel channels is greater than the imbalance threshold and/or that the NACK rate is greater than the NACK rate threshold, performing a fast rank reduction for a next downlink transmission whereby a rank is reduced from a rank indicator reported by the wireless device to some lower rank. Reducing the rank may improve downlink throughput.
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公开(公告)号：US20160337054A1
公开(公告)日：2016-11-17
申请号：US15112227
申请日：2014-02-19
发明人： Jianguo Long , Girum Fantaye , Bo Göransson
CPC分类号： H04B17/17 , H04B7/0689 , H04L1/1893 , H04L1/1896 , H04L5/0048 , H04W52/42
摘要： The disclosure relates to a method, performed in a multi-antenna radio access node comprising four logical antenna ports mapped to corresponding physical antennas, of transmitting data using three physical antennas. The method comprises determining (S51) loss of data transmission from one physical antenna of the four physical antennas. A required multi-antenna transmission scheme is determined (S52). An antenna mapping matrix prestored in the radio access node is selected (S53), the selected antenna mapping matrix adapted to the required multi-antenna transmission scheme. Data on the four logical antenna ports are re-mapped (S54) to the remaining three physical antennas by using the selected antenna mapping matrix, whereupon the data is transmitted (S55) from the remaining three physical antennas.
摘要翻译： 本公开涉及一种在包括映射到对应的物理天线的四个逻辑天线端口的多天线无线接入节点中执行的使用三个物理天线发送数据的方法。 该方法包括确定（S51）四个物理天线的一个物理天线的数据传输损失。 确定所需的多天线传输方案（S52）。 选择在无线电接入节点中预先存储的天线映射矩阵（S53），所选择的天线映射矩阵适合所需的多天线传输方案。 通过使用所选择的天线映射矩阵将四个逻辑天线端口上的数据重新映射（S54）到剩余的三个物理天线，从而剩余的三个物理天线发送数据（S55）。
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公开(公告)号：US11824610B2
公开(公告)日：2023-11-21
申请号：US17615630
申请日：2019-06-21
发明人： Jianguo Long , Yongquan Qiang
IPC分类号： H04B7/02 , H04B7/06 , H04B7/0456
CPC分类号： H04B7/0639 , H04B7/0456 , H04B7/068 , H04B7/0617
摘要： Embodiments of a method in a base station configured to transmit and receive wireless signals to and from a user equipment, UE. A downlink channel response of a first UE antenna is determined, based on uplink signals received from the UE. First preceding weights are calculated based on the determined channel response of the first UE antenna. Orthogonal or quasi-orthogonal preceding weights are determined based on the first preceding weights. First and second downlink signal layers are transmitted using the first preceding weights and the orthogonal or quasi-orthogonal preceding weights.
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公开(公告)号：US20230327783A1
公开(公告)日：2023-10-12
申请号：US18022768
申请日：2020-08-24
发明人： Shaohua Li , Jianguo Long
IPC分类号： H04B17/12
CPC分类号： H04B17/12
摘要： Embodiments of the present disclosure provide methods, apparatuses, and computer products for base station antenna calibration. A method is implemented in a base station for a cellular communications system. The method includes selecting, from a plurality of User Equipments, UEs, assistant UEs to assist the base station with antenna calibration, wherein selecting the assistant UEs is based upon criteria that includes UE channel state information, CSI, from the UEs; one or more uplink channel characteristics of an uplink channel from the UEs to the base station; a UE capability of the UEs, UE traffic information related to the UEs; and any combination thereof. A further step is obtaining antenna calibration assistance information from the assistant UEs, the antenna calibration assistance information being information that is used by the base station for antenna calibration.
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10.发明授权公开(公告)号：US11588525B2
公开(公告)日：2023-02-21
申请号：US17263286
申请日：2018-08-02
发明人： Yongquan Qiang , Ali Afana , Jianguo Long , Ahmed Nouah , Chaocheng Tu
IPC分类号： H04B7/0456 , H04B7/06 , H04B7/10
摘要： A network node, wireless device and methods for co-phasing for beamforming using co-phasing matrices for wireless communications are provided. In one example, a network node for co-phasing in beamforming for transmissions is provided. The network node includes processing circuitry including a processor and a memory where the memory contains instructions executable by the processor to configure the network node to: obtain co-phasing information associated with a wireless device, generate at least two co-phasing matrices based on the co-phasing information, and apply the at least two co-phasing matrices to at least two resource structures.
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