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1. 发明授权

US10063300B2 Computing PMIs, particularly in wireless communications systems having three-dimensional communications channels, using a reference antenna or a reference antenna subset 有权
公开(公告)号：US10063300B2
公开(公告)日：2018-08-28
申请号：US15312019
申请日：2015-03-19
申请人： NEC Corporation
发明人： Duong Pham , Yasushi Maruta
IPC分类号： H04B7/06 , H04B7/0456 , H04B7/0452
CPC分类号： H04B7/0478 , H04B7/0452 , H04B7/0626 , H04B7/063 , H04B7/0632 , H04B7/0691
摘要： A system includes an eNB which is operable to communicate with one or UEs and a set of multiple transmit antennas associated with the eNB. The antennas are partitioned into multiple antenna subsets. In a first form of the method, one of the antennas is designated as a reference antenna and the reference antenna forms part of each antenna subset. In a second form of the method, one of the subsets is designated as a reference subset. The UE(s) are operable to compute multiple PMIs for the respective multiple subsets and to report the multiple PMIs to the eNB for the eNB to use in precoding. The first form involves computing a PMI for a given antenna subset independently of the PMIs of any of the other antenna subsets. The second form involves computing a PMI for a given subset based on or using the PMI for the reference subset.

2. 发明授权

US09859964B2 Computing PMIs, particularly in wireless communications systems having a three-dimensional communications channel 有权
公开(公告)号：US09859964B2
公开(公告)日：2018-01-02
申请号：US15314003
申请日：2015-03-19
申请人： NEC Corporation
发明人： Duong Pham , Yasushi Maruta
IPC分类号： H04B7/04 , H04B7/0452 , H04B7/06 , H01Q21/06
CPC分类号： H04B7/046 , H01Q21/061 , H04B7/0452 , H04B7/0473 , H04B7/0626 , H04B7/063 , H04B7/0632 , H04B7/0691
摘要： A method for computing precoder matrix indicators (PMIs) in a wireless communication system is disclosed. The wireless communication system includes a base station (eNB) which is operable to communicate with one or more user equipments (UEs), and a set of transmit antennas associated with the eNB that have been partitioned into multiple antenna subsets. The UE(s) are operable to compute and report multiple PMIs for the said multiple antenna subsets to the eNB for the eNB to use in precoding. The method comprises computing a PMI for a given antenna subset using other already-computed PMI(s) for other(s) of the antenna subsets, such that the PMIs reported by the UE to the eNB account for correlation between the antenna subsets.

3. 发明申请

US20150131753A1 GENERATING PRECODERS FOR USE IN OPTIMISING TRANSMISSION CAPACITY BETWEEN AN ENODEB AND UE IN A DL MU-MIMO COMMUNICATIONS SYSTEM 有权
标题翻译：用于优化DL MU-MIMO通信系统中的ENODEB和UE之间的传输能力的生成预编译器
公开(公告)号：US20150131753A1
公开(公告)日：2015-05-14
申请号：US14404122
申请日：2013-04-12
申请人： NEC Corporation
发明人： Yasushi Maruta , Duong Pham
IPC分类号： H04B7/04
CPC分类号： H04B7/0456 , H04B7/0452 , H04B7/0473 , H04B7/0626 , H04B7/0632 , H04B7/0634 , H04B7/0639 , H04L5/006 , H04L25/03904 , H04L25/03968
摘要： This method of generating precoders is used in optimising transmission capacity between an eNodeB and UEs in a DL MU-MIMO communication system. The method includes the steps of computing correlation values between pairs of precoding matrices (PMs) of the reported precoding matrix indicators (PMIs) (step 40), selecting a PM pair having a minimum correlation value (step 42). If the minimum correlation value is less than a lower threshold Tmin, the method uses a PM corresponding to the received PMI (step 44). If the minimum correlation value is greater than Tmin and less than an upper threshold Tmax, the method includes the steps of computing correlation values of the reported PMI and Channel Matrices (CMs) from a fixed codebook of representative CMs (step 48), selecting a CM pair having a maximum correlation value (step 52), and computing precoders from the selected CM pair (step 54).
摘要翻译：这种生成预编码器的方法用于优化DL MU-MIMO通信系统中的eNodeB和UE之间的传输容量。该方法包括以下步骤：计算报告的预编码矩阵指示符（PMI）的预编码矩阵（PM）对之间的相关值（步骤40），选择具有最小相关值的PM对（步骤42）。如果最小相关值小于下限阈值Tmin，则该方法使用与接收到的PMI相对应的PM（步骤44）。如果最小相关值大于Tmin且小于上阈值Tmax，则该方法包括以下步骤：从代表CM的固定码本计算所报告的PMI和信道矩阵（CM）的相关值（步骤48），选择 CM对具有最大相关值（步骤52），以及从所选择的CM对计算预编码器（步骤54）。

4. 发明授权

US09929789B2 Method and system for MU-MIMO communication 有权
公开(公告)号：US09929789B2
公开(公告)日：2018-03-27
申请号：US15312238
申请日：2015-03-19
申请人： NEC Corporation
发明人： Duong Pham , Yasushi Maruta
IPC分类号： H04B7/06 , H04B7/0452 , H04B7/04 , H04W88/02 , H04W88/08
CPC分类号： H04B7/0639 , H04B7/0452 , H04B7/0478 , H04B7/0486 , H04B7/0626 , H04W88/02 , H04W88/08
摘要： A method and system for data communication in a Multiple-Input and Multiple-Output (MIMO) system is provided. The method includes receiving, from a first UE, first channel information relating to a first subset of a plurality of antennae of the MIMO system and second channel information relating to a second subset of a plurality of antennae. The method further includes generating first and second sub-precoders according to the first and second channel information, respectively. A precoder is then generated according at least in part to the first sub-precoder and the second sub-precoder, and data is transmitted to the first UE using the precoder.

5. 发明授权

US09825676B2 Generating precoders for joint transmission from multiple transmission points to multiple user equipments in a downlink coordinated multipoint transmission/reception communications system 有权
公开(公告)号：US09825676B2
公开(公告)日：2017-11-21
申请号：US14903065
申请日：2014-08-05
申请人： NEC Corporation
发明人： Duong Pham , Yasushi Maruta
IPC分类号： H04B7/02 , H04B7/024 , H04B7/06 , H04L5/00
CPC分类号： H04B7/024 , H04B7/0626 , H04B7/0639 , H04L5/0035
摘要： There is provided generating precoders for joint transmission (JT) in a downlink coordinated multi-point transmission/reception (DL COMP) wireless communications system. The system includes a plurality of transmission points (TPs) operable to communicate with a plurality of user equipments (UEs). Each UE has one of the TPs as its serving TP. The method includes transmitting channel state information (CSI) from each UE to its serving TP, wherein the transmitted CSI includes precoder matrix indicators (PMI), and using the PMI to generate precoders for transmission of data from the plurality of TPs to the plurality of UEs.

6. 发明授权

US09473225B2 Method for improving transmission capacity in a DL MU-MIMO communications system 有权
标题翻译：用于改善DL MU-MIMO通信系统中的传输容量的方法
公开(公告)号：US09473225B2
公开(公告)日：2016-10-18
申请号：US14425962
申请日：2013-09-13
申请人： NEC Corporation
发明人： Yasushi Maruta , Duong Pham , Arun Gurung
IPC分类号： H04B7/04 , H04B15/00 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/0452 , H04B7/0482 , H04B7/0486 , H04B7/0632 , H04B7/0639 , H04B7/065 , H04B7/0689 , H04B15/00 , H04L25/03343 , H04L25/03891
摘要： A method according to the present invention is for selecting User Equipment (UE) for scheduling/precoding within the coverage area of a communications node having a predefined codebook. The method includes: receiving at the communications node feedback information from each of the UEs within the coverage area of the communications node wherein the feedback information includes at least one precoder matrix indicator (PMI); generating at the communications node a precoder matrix based on the reported precoder matrix indicator from each UE; determining at the communications node correlation values for each UE in the coverage utilizing the precoder matrix; identifying a pair of UEs having minimum correlation values; and selecting the identified UEs for scheduling/precoding if the minimum correlation value is less than or equal to a threshold value.
摘要翻译：根据本发明的方法是用于选择在具有预定码本的通信节点的覆盖区域内进行调度/预编码的用户设备（UE）。该方法包括：在通信节点处从通信节点的覆盖区域内的每个UE接收反馈信息，其中反馈信息包括至少一个预编码器矩阵指示符（PMI）; 在所述通信节点处根据来自每个UE的报告的预编码器矩阵指示符在所述通信节点处生成预编码器矩阵; 在所述通信节点处使用所述预编码器矩阵来确定所述覆盖中的每个UE的相关值; 识别具有最小相关值的一对UE; 以及如果最小相关值小于或等于阈值，则选择所识别的UE进行调度/预编码。

7. 发明授权

US10250311B2 Method and system for MIMO communication 有权
公开(公告)号：US10250311B2
公开(公告)日：2019-04-02
申请号：US15529194
申请日：2015-05-01
申请人： NEC Corporation
发明人： Duong Pham , Yasushi Maruta
IPC分类号： H04B7/0456 , H04B7/0417 , H04B7/0426 , H04B7/06 , H04L25/02 , H04L5/14
摘要： A MIMO system (100) and a method of generating a precoder for use in a MIMO system (100), when communicating with a UE (115), are provided. The method comprises receiving, from the UE (115), channel information relating to a channel on which data is transmitted; decomposing the channel information into components representing a transmission component and a signal strength component; and generating the precoder according to the transmission component and the signal strength component.

8. 发明授权

US10205493B2 Method and system for MU-MIMO communication 有权
公开(公告)号：US10205493B2
公开(公告)日：2019-02-12
申请号：US15309940
申请日：2015-03-19
申请人： NEC Corporation
发明人： Duong Pham , Yasushi Maruta
IPC分类号： H04B7/0456 , H04W88/02 , H04B7/0452 , H04B7/06
摘要： A method and system for data communication in a Multi-user Multiple-Input and Multiple-Output (MU-MIMO) system is provided. The method includes receiving, from a first UE of the plurality of UEs, first and second channel information relating to first and second subsets of antennae; generating first and second sub-precoders according to the first and second channel information; generating a precoder according at least in part to the first and second sub-precoders; and transmitting data to the first UE using the precoder.

9. 发明授权

US09246564B2 Generating precoders for use in optimising transmission capacity between an eNodeBb and UE in a DL MU-MIMO communications system 有权
标题翻译：生成用于优化DL MU-MIMO通信系统中eNodeBb和UE之间的传输容量的预编码器
公开(公告)号：US09246564B2
公开(公告)日：2016-01-26
申请号：US14404122
申请日：2013-04-12
申请人： NEC Corporation
发明人： Yasushi Maruta , Duong Pham
IPC分类号： H04B7/04 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/0452 , H04B7/0473 , H04B7/0626 , H04B7/0632 , H04B7/0634 , H04B7/0639 , H04L5/006 , H04L25/03904 , H04L25/03968
摘要： This method of generating precoders is used in optimising transmission capacity between an eNodeB and UEs in a DL MU-MIMO communication system. The method includes the steps of computing correlation values between pairs of precoding matrices (PMs) of the reported precoding matrix indicators (PMIs) (step 40), selecting a PM pair having a minimum correlation value (step 42). If the minimum correlation value is less than a lower threshold Tmin, the method uses a PM corresponding to the received PMI (step 44). If the minimum correlation value is greater than Tmin and less than an upper threshold Tmax, the method includes the steps of computing correlation values of the reported PMI and Channel Matrices (CMs) from a fixed codebook of representative CMs (step 48), selecting a CM pair having a maximum correlation value (step 52), and computing precoders from the selected CM pair (step 54).
摘要翻译：这种生成预编码器的方法用于优化DL MU-MIMO通信系统中的eNodeB和UE之间的传输容量。该方法包括以下步骤：计算报告的预编码矩阵指示符（PMI）的预编码矩阵（PM）对之间的相关值（步骤40），选择具有最小相关值的PM对（步骤42）。如果最小相关值小于下限阈值Tmin，则该方法使用与接收到的PMI相对应的PM（步骤44）。如果最小相关值大于Tmin且小于上阈值Tmax，则该方法包括以下步骤：从代表CM的固定码本计算所报告的PMI和信道矩阵（CM）的相关值（步骤48），选择 CM对具有最大相关值（步骤52），以及从所选择的CM对计算预编码器（步骤54）。

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