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1. 发明申请

US20190058514A1 INTERFERENCE AVOIDANCE FOR BEAMFORMING TRANSMISSIONS IN WIRELESS COMMUNICATION DEVICES AND SYSTEMS 审中-公开
公开(公告)号：US20190058514A1
公开(公告)日：2019-02-21
申请号：US16166784
申请日：2018-10-22
申请人： Marvell World Trade Ltd.
发明人： Hongyuan ZHANG
IPC分类号： H04B7/06 , H04W72/08 , H04L25/03 , H04L25/02 , H04B7/0456 , H04L5/00
CPC分类号： H04B7/0617 , H04B7/0456 , H04B7/0619 , H04B7/0621 , H04B7/0626 , H04B7/0632 , H04L5/0048 , H04L25/0228 , H04L25/03904 , H04L25/0391 , H04W72/082
摘要： A first wireless communication device includes transceiver circuitry to access data corresponding to a beamforming transmission, transmit, from the first wireless communication device to at least one second wireless communication device, a first sounding packet, and receive, from the at least one second wireless communication device, at least one second sounding packet. The second sounding packet includes channel feedback determined at the at least one second wireless communication device. Processor circuitry is to determine a steering matrix based on the channel feedback. The steering matrix is configured to at least one of reduce and avoid interference caused at the at least one second wireless communication device by transmissions from the first wireless communication device. The transceiver circuitry is further to perform the beamforming transmission to at least one third wireless communication device in accordance with the data corresponding to the beamforming transmission and the steering matrix.

2. 发明申请

US20180159602A1 METHOD FOR CHANNEL PRECODING AND BASE STATION AND SERVER USING THE SAME 审中-公开
公开(公告)号：US20180159602A1
公开(公告)日：2018-06-07
申请号：US15383052
申请日：2016-12-19
申请人： INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
发明人： Chang-Lan TSAI , Chia-Hua LIN
IPC分类号： H04B7/0456 , H04W72/04 , H04B7/06
CPC分类号： H04L25/03904 , H04B7/0456 , H04B7/0617 , H04B7/0626 , H04B17/373 , H04L5/0023 , H04L5/0035 , H04L5/0057 , H04L25/0204 , H04L25/0222 , H04L25/03343
摘要： A method for channel precoding adapted to a base station is provided. An exemplary embodiment of the method includes: using a channel to communicate with a user equipment; obtaining a channel state of the channel; calculating a user equipment condition parameter(s) according to the channel state; transmitting the user equipment condition parameter(s) to a server; receiving a channel prediction parameter from the server; performing channel prediction according to the channel prediction parameter to obtain a predicted channel state of the channel; transmitting the predicted channel state to the server; receiving a precoding parameter from the server; and performing precoding according to the precoding parameter.

3. 发明授权

US09960875B2 Base station, communication system and method thereof 有权
公开(公告)号：US09960875B2
公开(公告)日：2018-05-01
申请号：US14682602
申请日：2015-04-09
申请人： NTT DoCoMo, Inc.
发明人： Chongning Na , Xiaolin Hou , Atsushi Harada , Hidetoshi Kayama
IPC分类号： H04J3/12 , H04J11/00 , H04B7/04 , H04B7/024 , H04B7/06 , H04W24/10 , H04B7/0456 , H04L25/03 , H04W28/06 , H04W28/16 , H04W92/20
CPC分类号： H04J11/0053 , H04B7/024 , H04B7/0456 , H04B7/0482 , H04B7/0626 , H04B7/0634 , H04L25/03904 , H04L25/0391 , H04W24/10 , H04W28/06 , H04W28/16 , H04W92/20
摘要： The present disclosure provides a base station, a communication system and a method thereof. The communication system includes three base stations adjacent to each other, and each base station serves at least one UE. The method includes: acquiring, by each base station, a channel matrix of a channel from the base station to an adjacent base station; calculating an interference alignment-based transmission precoding matrix for each base station based on the channel matrices of the channels between the base stations; and precoding, by each base station, data to be transmitted with the interference alignment-based transmission precoding matrix.

4. 发明授权

US09876540B2 Interference alignment based precoding method for reducing bandwidth of the backhaul network 有权
公开(公告)号：US09876540B2
公开(公告)日：2018-01-23
申请号：US14760387
申请日：2013-02-21
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Fredrik Lindqvist , Maxime Guillaud , Mohsen Rezaeekheirabadi
IPC分类号： H04B1/38 , H04B7/024 , H04W72/04 , H04B7/0456 , H04B7/06 , H04L5/14 , H04L25/03 , H04L5/00
CPC分类号： H04B7/024 , H04B7/0456 , H04B7/0626 , H04L5/0035 , H04L5/1469 , H04L25/03904 , H04L25/03949 , H04W72/0406
摘要： A method and a first radio node for determining a first precoder to be used by the first radio node for sending a transmission to a second radio node. The first radio node measures a set of cross-channel responses. The first radio node encodes the set of cross-channel responses into a first code-book index using a quantization scheme. The first radio node sends the first code-book index to a central unit. The first radio node receives a second code-book index from the central unit. The first radio node obtains a second precoder by decoding the second code-book index. The first radio node determines the first precoder by compensating the second precoder while taking the quantization scheme and the co-operative interference mitigation scheme into account. The first radio node applies the first precoder to the transmission, to be sent by the first radio node, to the second radio node.

5. 发明申请

US20170149482A1 BASE STATION APPARATUS AND TRANSMISSION METHOD 审中-公开
公开(公告)号：US20170149482A1
公开(公告)日：2017-05-25
申请号：US15426939
申请日：2017-02-07
申请人： Sun Patent Trust
发明人： Hui Tong , Masayuki Hoshino , Ming Xu , Seigo Nakao , Daichi Imamura
IPC分类号： H04B7/04 , H04B7/06 , H04L25/03 , H04B7/024
CPC分类号： H04B7/0478 , H04B7/024 , H04B7/0456 , H04B7/0469 , H04B7/0634 , H04B7/0639 , H04B7/0641 , H04B7/0663 , H04B2001/3855 , H04B2001/3861 , H04L25/03904 , H04L25/03917 , H04W88/02 , H04W88/08
摘要： The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal.

6. 发明授权

US09300502B2 Method and device for performing coordinated precoding in wireless access system 有权
标题翻译：在无线接入系统中执行协调预编码的方法和装置
公开(公告)号：US09300502B2
公开(公告)日：2016-03-29
申请号：US14390963
申请日：2013-04-08
申请人： LG ELECTRONICS INC.
发明人： Hyukjin Chae , Hakseong Kim
IPC分类号： H04W4/00 , H04L25/03 , H04B7/02 , H04B7/04 , H04B7/06
CPC分类号： H04L25/03904 , H04B7/024 , H04B7/0413 , H04B7/0456 , H04B7/0617 , H04L2025/03789
摘要： The present invention discloses a method and device for performing coordinated precoding in a wireless access system. In particular, the present invention includes: transmitting, to a base station, a measurement result of a plurality of interference signals by a terminal, the plurality of interference signals being transmitted from a plurality of adjacent base stations; receiving quasi-orthogonal CDM (Q-CDM) code information from the base station by the terminal in order to remove some of the plurality of interference signals, the Q-CDM code information being determined by the base station and the plurality of adjacent base stations; transmitting information on a channel state to the base station on the basis of a Q-CDM code by the terminal; and receiving downlink data, to which coordinated precoding is applied, from the base station by the terminal. Interference signals that have an intensity greater than a predetermined threshold from among the plurality of interference signals may be removed by using the Q-CDM code, and interference signals that have an intensity less than the predetermined threshold from among the plurality of interference signals may be removed by using null precoding.
摘要翻译：本发明公开了一种在无线接入系统中执行协调预编码的方法和装置。具体地说，本发明包括：通过终端向基站发送多个干扰信号的测量结果，所述多个干扰信号从多个相邻基站发送; 从终端接收来自基站的准正交CDM（Q-CDM）码信息，以去除多个干扰信号中的一些，由基站和多个相邻基站确定的Q-CDM码信息 ; 基于终端的Q-CDM码向基站发送关于信道状态的信息; 并且由终端从基站接收应用了协调预编码的下行链路数据。可以通过使用Q-CDM码来消除来自多个干扰信号中具有大于预定阈值的强度的干扰信号，并且从多个干扰信号中具有小于预定阈值的强度的干扰信号可以是通过使用空预编码去除。

7. 发明授权

US09130619B2 Finding channel state information with reduced codebook in a multi-antenna wireless communication system 有权
标题翻译：在多天线无线通信系统中用减少的码本查找信道状态信息
公开(公告)号：US09130619B2
公开(公告)日：2015-09-08
申请号：US13748212
申请日：2013-01-23
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Sairamesh Nammi
IPC分类号： H04B7/02 , H04B7/04 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/0413 , H04B7/0417 , H04B7/0478 , H04B7/0486 , H04B7/0617 , H04B7/063 , H04B7/066 , H04L25/03904
摘要： Multiple antennas employed at the transmitter and receiver can significantly increase a MIMO system capacity, especially when channel knowledge is available at the transmitter. Channel state information may be provided to the transmitter by the receiver in a codebook based precoding feedback. In a proposed approach is proposed in which the receiver conducts a search of precoder elements of a codebook to provide the transmitter with rank information and precoder control index that enhances capacity. Unlike the conventional exhaustive search, the proposed approach reduces complexity by reducing the search space of precoder elements for consideration. Performance loss is minimized by reducing the search space of higher rank precoder elements. For some ranks, the complexity is reduced without any performance sacrifice by grouping the precoder elements of the rank into groups of equivalent capacities and including at most one precoder element from each group into the search space.
摘要翻译：在发射机和接收机上使用的多个天线可以显着增加MIMO系统容量，特别是当发射机具有信道知识时。信道状态信息可以由基于码本的预编码反馈中的接收机提供给发射机。在提出的方法中，接收机进行码本的预编码器元件的搜索，以向发射机提供增强容量的等级信息和预编码器控制索引。与常规穷举搜索不同，所提出的方法通过减少预编码器元素的搜索空间来考虑来降低复杂度。通过减少高级预编码器元素的搜索空间来最大限度地降低性能损失。对于一些等级，通过将等级的预编码器元素分组成等同容量的组并且将每个组中的至少一个预编码器元素分组到搜索空间中，复杂度降低而没有任何性能牺牲。

8. 发明授权

US09124320B2 Mobile terminal apparatus, radio base station apparatus and radio communication method 有权
标题翻译：移动终端装置，无线基站装置和无线通信方法
公开(公告)号：US09124320B2
公开(公告)日：2015-09-01
申请号：US13978330
申请日：2011-12-09
申请人： Satoshi Nagata , Tetsushi Abe , Yoshihisa Kishiyama
发明人： Satoshi Nagata , Tetsushi Abe , Yoshihisa Kishiyama
IPC分类号： H04Q7/00 , H04B7/04 , H04B7/02 , H04L25/03 , H04L25/02
CPC分类号： H04B7/0456 , H04B7/024 , H04L25/0226 , H04L25/03904 , H04L25/03955
摘要： A mobile terminal apparatus estimates downlink channel states using respective reference signals included in downlink signals from plural cells; selects PMIs (Precoding Matrix Indicators) using a codebook based on the channel states; estimates a phase difference between the cells based on the selected PMIs or the channel states; and transmits information of the phase difference and the selected PMIs to radio base station apparatuses of the respective cells. A radio base station apparatus receives an uplink signal including a PMI and the information of the phase difference between the cells; multiplies a transmission signal by a precoding weight corresponding to the PMI; adjusts the phase difference between the cells with use of the information of the phase difference between the cells; and transmits the transmission signal to a radio base station apparatus of another cell by coordinated multi-point transmission.
摘要翻译：移动终端设备使用包括在来自多个小区的下行链路信号中的各个参考信号来估计下行链路信道使用基于信道状态的码本选择PMI（预编码矩阵指示符）; 基于所选择的PMI或信道状态来估计小区之间的相位差; 并将相位差信息和所选择的PMI发送到各小区的无线基站装置。无线基站装置接收包括PMI的上行链路信号和小区之间的相位差的信息; 将发送信号乘以对应于PMI的预编码权重; 使用细胞之间的相位差的信息来调整细胞之间的相位差; 并通过协调的多点发送将发送信号发送到另一小区的无线基站装置。

9. 发明申请

US20150222343A1 FINDING CHANNEL STATE INFORMATION WITH REDUCED CODEBOOK IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：在多天线无线通信系统中查找具有减少代码的通道状态信息
公开(公告)号：US20150222343A1
公开(公告)日：2015-08-06
申请号：US14685079
申请日：2015-04-13
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Sairamesh Nammi
IPC分类号： H04B7/04 , H04L25/03
CPC分类号： H04B7/0456 , H04B7/0413 , H04B7/0417 , H04B7/0478 , H04B7/0486 , H04B7/0617 , H04B7/063 , H04B7/066 , H04L25/03904
摘要： Multiple antennas employed at the transmitter and receiver can significantly increase a MIMO system capacity, especially when channel knowledge is available at the transmitter. Channel state information may be provided to the transmitter by the receiver in a codebook based precoding feedback. In a proposed approach is proposed in which the receiver conducts a search of precoder elements of a codebook to provide the transmitter with rank information and precoder control index that enhances capacity. Unlike the conventional exhaustive search, the proposed approach reduces complexity by reducing the search space of precoder elements for consideration. Performance loss is minimized by reducing the search space of higher rank precoder elements. For some ranks, the complexity is reduced without any performance sacrifice by grouping the precoder elements of the rank into groups of equivalent capacities and including at most one precoder element from each group into the search space.
摘要翻译：在发射机和接收机上使用的多个天线可以显着增加MIMO系统容量，特别是当发射机具有信道知识时。信道状态信息可以由基于码本的预编码反馈中的接收机提供给发射机。在提出的方法中，接收机进行码本的预编码器元件的搜索，以向发射机提供增强容量的等级信息和预编码器控制索引。与常规穷举搜索不同，所提出的方法通过减少预编码器元素的搜索空间来考虑来降低复杂度。通过减少高级预编码器元素的搜索空间来最大限度地降低性能损失。对于一些等级，通过将等级的预编码器元素分组成等同容量的组并且将每个组中的至少一个预编码器元素分组到搜索空间中，复杂度降低而没有任何性能牺牲。

10. 发明授权

US08982983B2 Method and apparatus for transmitting precoding martrix index and performing precoding 有权
标题翻译：用于发送预编码矩阵索引并执行预编码的方法和装置
公开(公告)号：US08982983B2
公开(公告)日：2015-03-17
申请号：US14249105
申请日：2014-04-09
申请人： Huawei Technologies Co., Ltd.
发明人： Qiang Wu , Mattias Frenne , Weijun Sun , Yongxing Zhou
IPC分类号： H04B7/10 , H04L25/03 , H04B7/06 , H04B7/04
CPC分类号： H04B7/0456 , H04B7/0469 , H04B7/0478 , H04B7/0482 , H04B7/0639 , H04B7/0663 , H04B7/10 , H04L25/03904 , H04L25/03942 , H04L25/03949 , H04W72/0413
摘要： A method and an apparatus for sending a Precoding Matrix Index (PMI) and performing precoding are provided in the embodiments of the present invention. The method for sending the PMI comprises the following steps: a user equipment acquires the transmission channel capability of carrying the PMI; according to the transmission channel capability of carrying the PMI, the precoding matrices are selected from a locally-stored first codebook set to form a second codebook set; a first precoding matrix is selected from the second codebook set; an index corresponding to the first precoding matrix is sent to a base station over the transmission channel so as to make the base station can find out the first precoding matrix according to the index and precode the data according to the first precoding matrix. The embodiments of the present invention can realize the flexible configuration and use of the PMI.
摘要翻译：在本发明的实施例中提供了用于发送预编码矩阵索引（PMI）和执行预编码的方法和装置。发送PMI的方法包括以下步骤：用户设备获取携带PMI的传输信道能力; 根据携带PMI的传输信道能力，从本地存储的第一码本集中选择预编码矩阵以形成第二码本集合; 从第二码本集合中选择第一预编码矩阵; 对应于第一预编码矩阵的索引通过传输信道被发送到基站，以使基站可以根据索引找出第一预编码矩阵，并根据第一预编码矩阵对数据进行预编码。本发明的实施例可以实现PMI的灵活配置和使用。

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